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CVE-2026-11824 SQLite CVE debrief

CVE-2026-11824 is a high-severity vulnerability in SQLite's FTS5 full-text search extension. The vulnerability exists in SQLite versions prior to 3.53.2 and allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata. This metadata specifies a szLeaf value smaller than 4, triggering an integer underflow in fts5ChunkIterate() and leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5. The vulnerability has a CVSS score of 8.5 and is considered HIGH severity.

Vendor
SQLite
Product
Unknown
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Developers and users of applications that utilize SQLite with the FTS5 full-text search extension should be aware of this vulnerability. This includes but is not limited to developers of mobile, web, and desktop applications that rely on SQLite for data storage and search functionality.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the FTS5 full-text search extension of SQLite. This occurs when a crafted database with malicious continuation page metadata is supplied, specifying a szLeaf value smaller than 4. This leads to an integer underflow in fts5ChunkIterate() and results in a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.

Defensive priority

High

Recommended defensive actions

  • Update SQLite to version 3.53.2 or later to mitigate this vulnerability.
  • Ensure that applications compiled with SQLITE_ENABLE_FTS5 are updated to use the patched version of SQLite.

Evidence notes

The vulnerability is confirmed to exist in SQLite versions prior to 3.53.2. The CVE record and NVD detail provide additional information on the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11824 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11824

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11824 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11824

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.