Not ratedCVE-2026-119618

    Apache HTTP Server: mod_http2: heap corruption and RCE in assign_headers (CVE-2026-119618)

    Published Last modified Sources: Red Hat, Debian LTS, CVE.org, EUVD, BSI, Debian

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    What is affected, what to do

    Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70.

    Update HTTP Server to version 2.4.71.

    Affected
    • Apache HTTP Server lte 2.4.55..2.4.70

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

    Metrics

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    XIEM Effective CVSS

    No value is available for this vulnerability.

    0.0

    CVSS v3

    Severity Not rated on the scale from 0 to 10.

    Source: Red Hat, Debian LTS, CVE.org, EUVD, BSI, Debian

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    EPSS score

    No value is available for this vulnerability.

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    Severity
    Not rated
    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
    30.00 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
    no public PoC known
    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
    0.0
    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
    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-362

    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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

    Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70. Affected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.

    Source: redhat_csaf, Debian LTS Advisories, cvelistv5, ENISA EUVD, NVD (NIST), BSI CSAF, BSI WID Portal, Debian Security Advisories, CVE.org (MITRE)

    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
    Apache Software FoundationApache HTTP Server
    • 2.4.55 – ≤ 2.4.70
    • —
    ApacheHTTP Server
    • < 2.4.71
    • 2.4.71

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianapache2bookworm
    Linuxdebianapache2trixie

    Weakness classes (CWE)

    • CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

      Class

      The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

      Entry at MITRE CWE-362

    References & sources

    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://ubuntu.com/security/CVE-2026-119618

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

    2. Record modifiedCVE Program

      Show 5 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/security/cve/cve-2026-119618
      Referenceadded
      —
      https://bugs.gentoo.org/986161
      Referenceadded
      —
      https://github.com/AlmaLinux/updates/issues/4252
      Referenceadded
      —
      https://github.com/microsoft/azurelinux/pull/20165
      Referenceadded
      —
      https://www.wiz.io/blog/cve-2026-119618-rce-apache-http-server-vulnerability

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

    3. Record modifiedCVE Program

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      http://www.openwall.com/lists/oss-security/2026/11/11/13

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

    4. ReceivedApache

      Weakness type: CWE-362

      Description added or changed

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70. Affected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.
      Weakness type (CWE)added
      —
      CWE-362
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/119xxx/CVE-2026-119618.json">CVE-2026-119618</a>
      Referenceadded
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      https://httpd.apache.org/security/vulnerabilities_24.html

      Source identifier: security@apache.org

    Linked advisories

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