CriticalCVE-2026-110264

    GitLab: Integer Overflow or Wraparound (CVE-2026-110264)

    Published Last modified Sources: BSI

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    What is affected, what to do

    An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server due to integer overflow when compiling a specially crafted regular expression.

    An exploit is publicly available. Update GitLab to version 18.11.13, GitLab to version 19.0.10, GitLab to version 19.1.9.

    Affected
    • GitLab lt 7.0..18.11.13
    • GitLab lt 19.0..19.0.10
    • GitLab lt 19.1..19.1.9
    • GitLab lt 19.2..19.2.9
    • GitLab lt 19.3..19.3.6
    • GitLab lt 19.4..19.4.3
    • GitLab lt 19.5..19.5.1
    Fixed in
    • GitLab 18.11.13
    • GitLab 19.0.10
    • GitLab 19.1.9
    • GitLab 19.2.9
    • GitLab 19.3.6
    • GitLab 19.4.3
    • GitLab 19.5.1

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    10.0

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    10.0

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: BSI

    1.4 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 71.5

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    53.18 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    PoC (publicly reported)
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    10.0 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    10.0
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    1.4 %
    Moderate — model estimates 1-10% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    71.5
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 21 October 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-190

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server due to integer overflow when compiling a specially crafted regular expression.

    Source: BSI WID Portal

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    GitLabGitLab
    • 10.1 – < 19.3.6
    • 12.0 – < 19.3.6
    • 15.0 – < 19.3.6
    • 15.10 – < 19.3.6
    • 17.4 – < 19.3.6
    • 17.6.5 – < 19.3.6
    • 17.8 – < 19.3.6
    • 18.2 – < 19.3.6
    • 18.3 – < 19.3.6
    • 19.0 – < 19.0.10
    • 19.1 – < 19.1.9
    • 19.2 – < 19.2.9
    • 19.2 – < 19.3.6
    • 19.3 – < 19.3.6
    • 19.4 – < 19.4.3
    • 19.5 – < 19.5.1
    • 7.0 – < 18.11.13
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.0.10
    • 19.1.9
    • 19.2.9
    • 19.3.6
    • 19.3.6
    • 19.4.3
    • 19.5.1
    • 18.11.13
    gitlabgitlab
    • 10.1.0 – < 19.3.6
    • 12.0.0 – < 19.3.6
    • 15.0.0 – < 19.3.6
    • 15.10 – < 19.3.6
    • 17.4.0 – < 19.3.6
    • 17.6.5 – < 19.3.6
    • 17.8.0 – < 19.3.6
    • 18.2.0 – < 19.3.6
    • 18.3.0 – < 19.3.6
    • 19.0.0 – < 19.0.10
    • 19.1.0 – < 19.1.9
    • 19.2.0 – < 19.2.9
    • 19.2.0 – < 19.3.6
    • 19.3.0 – < 19.3.6
    • 19.4.0 – < 19.4.3
    • 19.5.0
    • 7.0.0 – < 18.11.13
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.0.10
    • 19.1.9
    • 19.2.9
    • 19.3.6
    • 19.3.6
    • 19.4.3
    • —
    • 18.11.13
    Open SourceGitLab
    • < 18.11.13
    • < 19.0.10
    • < 19.1.9
    • < 19.2.9
    • < 19.3.6
    • < 19.4.3
    • < 19.5.1
    • 18.11.13
    • 19.0.10
    • 19.1.9
    • 19.2.9
    • 19.3.6
    • 19.4.3
    • 19.5.1
    Distribution and container packages (16)

    Downstream packages (e.g. Bitnami, Debian, Ubuntu, Red Hat). Versions refer to the distribution, not the vendor.

    Distribution and container packages
    Affected versionsFixed in
    bitnamigitlab
    • 10.1.0
    • 12.0.0
    • 15.0.0
    • 15.10.0
    • 17.4.0
    • 17.6.5
    • 17.8.0
    • 18.2.0
    • 18.3.0
    • 19.0.0
    • 19.1.0
    • 19.2.0
    • 19.3.0
    • 19.4.0
    • 19.5.0
    • 7.0.0
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.3.6
    • 19.0.10
    • 19.1.9
    • 19.2.9
    • 19.3.6
    • 19.4.3
    • 19.5.1
    • 18.11.13
    From bundled advisories, not CVE-specific (6)

    Product list of a bundled advisory that does not state which product this CVE affects.

    Products from bundled advisories
    Affected versionsFixed in
    —Ruby (CRuby / Onigmo regex engine)
    • < 3.3.13
    • < 3.4.12
    • < 4.0.9
    • Only apps that compile a regular expression from an attacker-controlled string
    • Ruby 3.2 and older: end-of-life (3.2 since 2026-04-01), no fixed release
    • 3.3.13
    • 3.4.12
    • 4.0.9
    • —
    • —
    gitlabgitlab
    • < 18.11.13
    • 18.11.13

    Vendors and products

    Weakness classes (CWE)

    • CWE-190Integer Overflow or Wraparound

      Base

      The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

      Entry at MITRE CWE-190

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    Metasploit Framework (Pull Request)Metasploit PR #22017 (opens in a new tab)github.comPoC (publicly reported)reported, not verified—
    Reference tagged as exploithackerone.com (opens in a new tab)PoC (publicly reported)reported, not verified—

    References & sources

    • docs.gitlab.comGitLab Critical Patch Release: 19.5.1, 19.4.3, 19.3.6, 19.2.9, 19.1.9, 19.0.10, 18.11.13pwn-watch, Release notes, Vendor advisory, advisory
    • gitlab.comgitlab-org/gitlab/-/work_items/633633Permissions required, web
    • hackerone.comHackerOne Bug Bounty Report #4093475Technical description, Exploit, Permissions required, Permissions required, web
    • pwn.watchpwn.watch: Ruby 4.0.9, 3.4.12 and 3.3.13 fix Regexp compiler memory bugs behind GitLab's CVSS 10 RCEspwn-watch
    • thehackernews.comRuby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flawspwn-watch
    • ruby-lang.orgRegexp compilation fixes related to GitLab's CVE-2026-89078, CVE-2026-93577, CVE-2026-97229 and CVE-2026-110264pwn-watch
    • ruby-lang.orgRuby 4.0.9 Releasedpwn-watch
    • ruby-lang.orgRuby 3.4.12 Releasedpwn-watch
    • ruby-lang.orgRuby 3.3.13 Releasedpwn-watch
    • ruby-lang.orgRuby Maintenance Branchespwn-watch
    • docs.gitlab.comGitLab Critical Patch Release: 19.4.2, 19.3.5, 19.2.8pwn-watch
    • docs.gitlab.comGitLab Critical Patch Release: 19.4.1, 19.3.3, 19.2.7pwn-watch
    • rapid7.comGitLab CI/CD Regex Integer Overflow (CVE-2026-97229) technical analysispwn-watch
    • pwn.watchpwn.watch: GitLab CVSS 10 unauthenticated RCE via regex compiler (CVE-2026-110264)pwn-watch
    • theregister.comMax-severity GitLab bug allows remote code execution over 12 years of releasespwn-watch
    • tenable.comCVE-2026-110264 (Tenable)pwn-watch
    • bleepingcomputer.comGitLab warns of new max severity code execution vulnerabilitypwn-watch
    • NVD (NIST)vuln/detail/CVE-2026-110264web
    • cisa.govCISA Adds Two Known Exploited Vulnerabilities to Catalogpwn-watch
    • alpinelinux.orgGitLab security incident: attempted exploitation of CVE-2026-97229pwn-watch

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedCVE Program

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/

      Source identifier: af854a3a-2127-422b-91ae-364da2661108

    2. Initial analysis by NVDNVD

      Newly listed as affected:
      • GitLab (19.4.0 – before 19.4.3; 19.0.0 – before 19.0.10; 19.1.0 – before 19.1.9; 19.2.0 – before 19.2.9; 19.3.0 – before 19.3.6; 7.0.0 – before 18.11.13; 1 individual version)
      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Product configurationadded
      —
      OR *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 19.4.0 up to (excluding) 19.4.3 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 19.4.0 up to (excluding) 19.4.3 *cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:community:*:*:* *cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:enterprise:*:*:* *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 19.0.0 up to (excluding) 19.0.10 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 19.1.0 up to (excluding) 19.1.9 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 19.2.0 up to (excluding) 19.2.9 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 19.3.0 up to (excluding) 19.3.6 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 7.0.0 up to (excluding) 18.11.13 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 19.0.0 up to (excluding) 19.0.10 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 19.1.0 up to (excluding) 19.1.9 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 19.2.0 up to (excluding) 19.2.9 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 19.3.0 up to (excluding) 19.3.6 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 7.0.0 up to (excluding) 18.11.13
      Reference typeadded
      —
      GitLab Inc.: https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/ Types: Release Notes, Vendor Advisory
      Reference typeadded
      —
      GitLab Inc.: https://gitlab.com/gitlab-org/gitlab/-/work_items/633633 Types: Permissions Required
      Reference typeadded
      —
      GitLab Inc.: https://hackerone.com/reports/4093475 Types: Permissions Required

      Source identifier: nvd@nist.gov

    3. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentremoved
      {"id":"CVE-2026-110264","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-22T12:50:08.716294Z"}
      —
      SSVC assessmentadded
      —
      {"id":"CVE-2026-110264","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-21T00:00:00+00:00"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    4. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-110264","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-22T12:50:08.716294Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    5. ReceivedGitLab

      CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

      Weakness type: CWE-190

      Description added or changed

      Show 7 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server due to integer overflow when compiling a specially crafted regular expression.
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
      Weakness type (CWE)added
      —
      CWE-190
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/110xxx/CVE-2026-110264.json">CVE-2026-110264</a>
      Referenceadded
      —
      https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
      Referenceadded
      —
      https://gitlab.com/gitlab-org/gitlab/-/work_items/633633
      Referenceadded
      —
      https://hackerone.com/reports/4093475

      Source identifier: cve@gitlab.com

    Linked CVEs

    Linked CVEs
    HighCVE-2026-16255Incorrect Authorization in GitLab7.1—
    HighCVE-2026-15723Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab8.2—
    LowCVE-2026-14288Use of Incorrectly-Resolved Name or Reference in GitLab3.1—
    MediumCVE-2026-13319Authorization Bypass Through User-Controlled Key in GitLab6.5—
    MediumCVE-2026-12664Incorrect Authorization in GitLab6.8—
    MediumCVE-2026-112378Use of Less Trusted Source in GitLab4.3—
    LowCVE-2026-112326Improper Cleanup on Thrown Exception in GitLab3.1—
    HighCVE-2026-112212Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab7.5—
    CriticalCVE-2026-110264Integer Overflow or Wraparound in GitLab10.0—
    MediumCVE-2026-105777Insertion of Sensitive Information Into Sent Data in GitLab6.5—
    LowCVE-2026-105711Use of Cache Containing Sensitive Information in GitLab3.5—
    LowCVE-2026-103515Incorrect Authorization in GitLab2.7—

    Linked advisories

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    Badge preview for CVE-2026-110264
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-110264"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-110264.svg?lang=en" alt="CVE-2026-110264 – NEOSEC Intel" height="20"></a>