CVE-2026-119373

Description

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.

Metrics

CVSS 3.1

7.8 (HIGH) Score source: NVD CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS 4.0

8.5 (HIGH) Score source: CNA CVSS:4.0/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

EPSS — exploit probability

0% (percentile: 4) as of 1 November 2026

CWE

CWE-787

References

• https://abraxaslabs.tech/research/sqlite-fts5-rowidmerge
• https://github.com/sqlite/sqlite
• https://github.com/sqlite/sqlite/blob/version-3.53.4/ext/fts5/fts5_index.c#L6107
• https://github.com/sqlite/sqlite/commit/e1c9934f9f11a499029abb020ea715a08970da80
• https://sqlite.org/bugs/info/2026-08-04T08:49:27Z
• https://sqlite.org/releaselog/3_54_0.html
• https://sqlite.org/src/info/a7f8c92f62
• https://www.vulncheck.com/advisories/sqlite-before-3.54.0-fts5-heap-buffer-over…