Is CVE-2026-14678 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-14678?

CVE-2026-14678 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-14678

Description

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.