CVE-2026-14681
Publication date 13 August 2026
Last updated 25 August 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| postgresql-18 | 26.04 LTS resolute |
Fixed 18.6-0ubuntu0.26.04.1
|
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| postgresql-16 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy | Not in release | |
| postgresql-14 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy |
Not affected
|
|
| postgresql-12 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal |
Not affected
|
|
| postgresql-10 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 18.04 LTS bionic |
Not affected
|
|
| postgresql-9.5 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 16.04 LTS xenial |
Not affected
|
|
| postgresql-9.3 | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 14.04 LTS trusty |
Vulnerable, fix deferred
|
Notes
leosilva
PostgreSQL 9.3 is end of life upstream, and no updates are are available. Marking as deferred in -esm-main releases. PostgreSQL 9.3 is end of life upstream, and no updates are are available. Marking as deferred in -esm-main releases. PostgreSQL 9.3 is end of life upstream, and no updates are are available. Marking as deferred in -esm-main releases. PostgreSQL 9.3 is end of life upstream, and no updates are are available. Marking as deferred in -esm-main releases.
mdeslaur
only affects 17+
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.2 · Medium
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8653-1
- PostgreSQL vulnerabilities
- 20 August 2026