CVE-2026-14681 — PostgreSQL improper enforcement of GSSAPI encryption when coupled with SSL

Affected: PostgreSQL

Improper enforcement of message integrity in PostgreSQL GSSAPI support allows a user to negotiate GSSAPI contrary to pg_hba.conf rules, via initial direct TLS connection. Despite a pg_hba.conf that appears to require GSSAPI, the connection may exchange data over TLS encryption alone. If the TLS settings are more permissive than the GSS settings, the connection may continue with lesser protection. Within major versions 17-18, minor versions before PostgreSQL 18.6 and 17.11 are affected. Versions before PostgreSQL 17 are unaffected.

USN-8653-1 — postgresql-14, postgresql-16, postgresql-18 vulnerabilities

Affected: Ubuntu:22.04:LTS: postgresql-14, Ubuntu:24.04:LTS: postgresql-16, Ubuntu:26.04:LTS: postgresql-18

It was discovered that PostgreSQL incorrectly handled COPY FROM STDIN when an early failure occurred. An authenticated user could possibly use this issue to execute arbitrary SQL commands. (CVE-2026-6464)

It was discovered that PostgreSQL incorrectly reset extended statistics ownership during ALTER TABLE ALTER TYPE operations. An attacker could possibly use this issue to obtain sensitive information or gain unintended privileges. (CVE-2026-6469)

It was discovered that PostgreSQL failed to check the USAGE privilege on types. An authenticated user could possibly use this issue to obtain sensitive information. (CVE-2026-6470)

It was discovered that PostgreSQL logical decoding could load arbitrary shared libraries. An authenticated user could possibly use this issue to execute arbitrary code. (CVE-2026-6471)

It was discovered that PostgreSQL had integer wraparound issues in tsvector and tsquery allocations. An authenticated user could possibly use this issue to execute arbitrary code. (CVE-2026-14662)

It was discovered that PostgreSQL pgcrypto silently used cleartext when OpenSSL-disabled ciphers were requested. An authenticated user could possibly use this issue to obtain sensitive information. (CVE-2026-14663)

It was discovered that PostgreSQL had a heap buffer overflow in regular expression processing. An authenticated user could possibly use this issue to execute arbitrary code. (CVE-2026-14664)

It was discovered that PostgreSQL row security policies were not properly…

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CVE-2026-14681 — PostgreSQL improper enforcement of GSSAPI encryption when coupled with SSL

USN-8653-1 — postgresql-14, postgresql-16, postgresql-18 vulnerabilities