CVE-2026-14678 PUBLISHED

PostgreSQL pg_trgm picksplit reads past end of buffer

Assigner: PostgreSQL
Reserved: 03.07.2026 Published: 13.08.2026 Updated: 13.08.2026

Buffer over-read in PostgreSQL pg_trgm index picksplit function reads past end of a heap buffer. This might allow a table maintainer to infer limited memory values, via the lossy signal of index split choices. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 4.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	n/a
Product	PostgreSQL
Versions	Default: unaffected affected from 18 to 18.5 (excl.) affected from 17 to 17.11 (excl.) affected from 16 to 16.15 (excl.) affected from 15 to 15.19 (excl.) affected from 0 to 14.24 (excl.)

Affected Configurations

Attacker has permission to "CREATE EXTENSION pg_trgm", or another user previously issued that. Attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema).

Credits

The PostgreSQL project thanks Mehmet D. INCE for reporting this problem.

References

https://www.postgresql.org/support/security/CVE-2026-14678/

Problem Types

Buffer Over-read CWE