CVE-2026-14681Network attack vector

GSSAPI policy bypass via post-TLS encryption request

Published Aug 13, 2026 · Updated Aug 13, 2026

Message-integrity failure in PostgreSQL 17 before 17.11 and 18 before 18.5 allows remote authenticated users to bypass GSSAPI policy. The core server accepts a GSS encryption request after direct TLS is established, then treats the TLS-only channel as GSS-encrypted for pg_hba.conf matching. Exploitation requires GSSAPI negotiation and a pg_hba.conf policy that requires GSSAPI while allowing less-protective TLS settings.

CVSS severity4.2
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Message-integrity failure in PostgreSQL 17 before 17.11 and 18 before 18.5 allows remote authenticated users to bypass GSSAPI policy. The core server accepts a GSS encryption request after direct TLS is established, then treats the TLS-only channel as GSS-encrypted for pg_hba.conf matching. Exploitation requires GSSAPI negotiation and a pg_hba.conf policy that requires GSSAPI while allowing less-protective TLS settings.

The record

CVE
CVE-2026-14681
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
PostgreSQL Global Development Group
Product
PostgreSQL
Classifications
CWE-924, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17 <17.11
  2. Affected versionversion=18 <18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PostgreSQL Global Development Group · PostgreSQLversion=17 <17.11; version=18 <18.5

Published CVSS scores

4.2PostgreSQL CNACVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-924Improper Enforcement of Message Integrity During Transmission in a Communication Channel
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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