CVE-2026-14681
MediumCVSS 4.2Exploitation Probability (EPSS)
Low risk0th percentile - higher than 0% of all known CVEs
Summary
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 TLS settings are more permissive than GSS settings, the connection may continue with lesser protection. Within major versions 17-18, minor versions before PostgreSQL 18.5 and 17.11 are affected; versions before PostgreSQL 17 are unaffected.
Risk Assessment
The risk includes the possibility of establishing connections with lower authentication than required, potentially leading to unauthorized data access.
Recommendation
Upgrade PostgreSQL to a patched version and align TLS and GSSAPI configurations with security requirements.
Original NVD description (English source)
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 18.5 and 17.11 are affected. Versions before PostgreSQL 17 are unaffected.