🛡️ CVE-2026-6666 — pgbouncer

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-476 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

PgBouncer crash in kill_pool_logins_server_error

A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2026-6666 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2026-6666 is recorded against 2 packages.

  • pgbouncer
  • unknown

Timeline and source

Published on 12 May 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Web)
www.pgbouncer.org (Web)

CVE-2026-6666 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-476
Public Exploit ✅ No
Source NVD
Published 2026-05-12
Updated 2026-08-12
Modified 2026-07-24
Fix URL N/A

Affected Packages

Software From version Fixed in
pgbouncer — —
unknown — —

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