HighCVE-2026-11822

    SQLite before 3.53.2 Out-of-Bounds Read in FTS5 fts5LeafSeek (CVE-2026-11822)

    Published Last modified Sources: Red Hat, Siemens ProductCERT, BSI, OSV, CVE.org, Msrc Update Guide, Ubuntu

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    What is affected, what to do

    A flaw was found in SQLite's FTS5 full-text search extension. This vulnerability involves memory corruption, specifically an out-of-bounds read and a heap buffer overflow, which can be triggered by supplying a crafted database with malformed FTS5 page data.

    Update SQLite to version 3.53.2.

    Affected
    • SQLite lt *..3.53.2
    Fixed in
    • SQLite 3.53.2

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

    Metrics

    8.5

    Priority

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

    Source: NVD, CVSS v4

    5.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: Red Hat, Siemens ProductCERT, BSI, OSV, CVE.org, Msrc Update Guide, Ubuntu

    0.2 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 9.3

    Show all metrics
    Severity
    High
    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
    52.99 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
    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
    8.5 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
    5.5
    CVSS v4

    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
    6.8
    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
    0.2 %
    Low — model estimates < 1% 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
    9.3
    Low — this CVE sits in the lower 10% of all CVEs scored today.
    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 · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 9 June 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-125

    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

    A flaw was found in SQLite's FTS5 full-text search extension. This vulnerability involves memory corruption, specifically an out-of-bounds read and a heap buffer overflow, which can be triggered by supplying a crafted database with malformed FTS5 page data. When an FTS5 MATCH query is executed against such a database, an attacker can cause process crashes, memory exhaustion, or achieve arbitrary code execution, potentially compromising the system.

    Source: redhat_csaf, siemens_advisory, BSI WID Portal, BSI CSAF, OSV (Open Source Vulnerabilities), NVD (NIST), Microsoft Security Update Guide, CVE.org (MITRE), cvelistv5, Ubuntu Security Notices

    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
    SQLiteSQLite
    • < 3.53.2
    • 3.53.2
    sqlitesqlite
    • < 3.53.2
    • 3.53.2
    IBMQRadar SIEM
    • < 7.6.0.3
    • <7.5.0 UP16 IF01
    • 7.6.0.3
    • —
    Red HatEnterprise Linux
    • 8
    • —
    Distribution and container packages (1)

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

    Distribution and container packages
    Affected versionsFixed in
    bitnamisqlite
    • —
    • 3.53.2

    Vendors and products

    Weakness classes (CWE)

    • CWE-125Out-of-bounds Read

      Base

      The product reads data past the end, or before the beginning, of the intended buffer.

      Entry at MITRE CWE-125

    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 modifiedVulnCheck

      CVSS V4.0: AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

      CVSS V4.0: before AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N, after —

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

      CVSS V3.1: before AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, after —

      Weakness type: CWE-125

      Description added or changed

      Show 13 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionchanged
      SQLite before 3.53.2 contains memory corruption vulnerabilities in the FTS5 full-text search extension that allow attackers to cause process crashes, memory exhaustion, or arbitrary code execution by supplying a crafted database with malformed FTS5 page data. Attackers can trigger an out-of-bounds read in fts5LeafSeek() via an attacker-controlled loop bound and a heap buffer overflow write in fts5ChunkIterate() through a crafted continuation page causing an integer underflow, exploitable when an FTS5 MATCH query is executed against the malicious database.
      SQLite before 3.53.2 contains an out-of-bounds read vulnerability in the FTS5 full-text search extension that allows attackers to crash the process by supplying a crafted database with a malformed FTS5 leaf page. Attackers can set an oversized term length in the leaf page so that fts5LeafSeek() reads past the end of the page buffer while comparing terms during an FTS5 MATCH query, in applications compiled with SQLITE_ENABLE_FTS5.
      CVSSadded
      —
      AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      CVSSremoved
      AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      —
      CVSSadded
      —
      AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
      CVSSremoved
      AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
      —
      Weakness type (CWE)added
      —
      CWE-125
      Weakness type (CWE)removed
      CWE-122
      —
      Referenceadded
      —
      https://sqlite.org/src/info/87b653731171
      Referenceadded
      —
      https://sqlite.org/src/info/fad98805b7d7
      Referenceremoved
      https://sqlite.org/src/info/061febcf41ca
      —
      Referenceremoved
      https://sqlite.org/src/info/4a5ad516ea93
      —
      Reference typeremoved
      https://sqlite.org/src/info/061febcf41ca Types: Issue Tracking, Patch
      —
      Reference typeremoved
      https://sqlite.org/src/info/4a5ad516ea93 Types: Issue Tracking, Patch
      —

      Source identifier: disclosure@vulncheck.com

    2. Record modifiedVulnCheck

      Show 12 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://sqlite.org/releaselog/3_53_2.html
      Referenceadded
      —
      https://sqlite.org/src/info/061febcf41ca
      Referenceadded
      —
      https://sqlite.org/src/info/4a5ad516ea93
      Referenceadded
      —
      https://www.vulncheck.com/advisories/sqlite-before-memory-corruption-in-fts5-extension
      Referenceremoved
      https://sqlite.org/releaselog/3_53_2.html
      —
      Referenceremoved
      https://sqlite.org/src/info/061febcf41ca
      —
      Referenceremoved
      https://sqlite.org/src/info/4a5ad516ea93
      —
      Referenceremoved
      https://www.vulncheck.com/advisories/sqlite-before-memory-corruption-in-fts5-extension
      —
      Reference typeremoved
      https://sqlite.org/releaselog/3_53_2.html Types: Release Notes
      —
      Reference typeremoved
      https://sqlite.org/src/info/061febcf41ca Types: Issue Tracking, Patch
      —
      Reference typeremoved
      https://sqlite.org/src/info/4a5ad516ea93 Types: Issue Tracking, Patch
      —
      Reference typeremoved
      https://www.vulncheck.com/advisories/sqlite-before-memory-corruption-in-fts5-extension Types: Third Party Advisory
      —

      Source identifier: disclosure@vulncheck.com

    3. Record modifiedSiemens ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/11xxx/CVE-2026-11822.json">CVE-2026-11822</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-765416.html

      Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

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