Buffer overflow in Sqlite
CVE-2026-11824
SQLite before 3.53.2 contains a heap-based buffer overflow vulnerability in the FTS5 full-text search extension that allows attackers to cause a crash or execute arbitrary code by supplying a crafted database with malicious continuation page metadata specifying a szLeaf value smaller than 4. Attackers can trigger an integer underflow in fts5ChunkIterate() causing an inflated remaining byte count during FTS5 MATCH query processing, leading to a heap buffer overflow of attacker-controlled data in applications compiled with SQLITE_ENABLE_FTS5.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Sqlite — versions 0
Weakness classification (CWE)
References
- sqlite.org/releaselog/3_53_2.html (release-notes, Release Notes)
- sqlite.org/src/info/061febcf41ca (Patch, patch, Issue Tracking)
- sqlite.org/src/info/4a5ad516ea93 (Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/sqlite-before-heap-buffer-overflow-via-fts5-fts5ch… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-11824?
- CVE-2026-11824 is a high-severity vulnerability in Sqlite, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-06-09.
- How severe is CVE-2026-11824?
- High severity. CVSS v3 base score is 7.8 out of 10.