CVE-2026-14681

CVE-2026-14681 is a medium-severity vulnerability in Postgresql with a CVSS 3.x base score of 4.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-924.

Key facts

• Severity: Medium (CVSS 3.x base score 4.2)
• EPSS exploit prediction: 0% (1st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-924
• Affected product: Postgresql
• Published: 2026-08-13
• Last modified: 2026-08-19

Description

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.

Frequently asked questions

What is CVE-2026-14681?

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.

How severe is CVE-2026-14681?

CVE-2026-14681 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-14681 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-14681?

CVE-2026-14681 affects Postgresql. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-14681?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-14681 published?

CVE-2026-14681 was published on 2026-08-13 and last updated on 2026-08-19.

References

• https://www.postgresql.org/support/security/CVE-2026-14681/

Affected products (1)

• cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*

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