Buffer overflow in Sqlite
CVE-2026-119373
SQLite before 3.54.0 built with FTS5 contains a heap buffer overflow in fts5MergeRowidLists() that undersizes the output buffer when merging detail=none prefix doclists. Attackers who can populate a detail=none FTS5 table with negative rowids and run a prefix MATCH query can write past the allocation, corrupting heap memory and crashing the process.
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- sqlite.org/bugs/info/2026-08-04T08:49:27Z (issue-tracking)
- sqlite.org/src/info/a7f8c92f62 (patch)
- github.com/sqlite/sqlite/commit/e1c9934f9f11a499029abb020ea715a08970da80 (patch)
- github.com/sqlite/sqlite/blob/version-3.53.4/ext/fts5/fts5_index.c (technical-description)
- sqlite.org/releaselog/3_54_0.html (release-notes)
- abraxaslabs.tech/research/sqlite-fts5-rowidmerge (third-party-advisory)
- github.com/sqlite/sqlite (product)
- www.vulncheck.com/advisories/sqlite-before-3.54.0-fts5-heap-buffer-overflow-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119373?
- CVE-2026-119373 is a high-severity vulnerability in Sqlite, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-10-30.
- How severe is CVE-2026-119373?
- High severity. CVSS v3 base score is 7.8 out of 10.