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VulnerabilityPublished

CVE-2026-116321: PostgreSQL · Improper Null Termination

Affects PostgreSQLSource CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium · fixed in 18.7 : update PostgreSQL when convenient.

Data as of 12 Nov 2026, 14:48 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (PostgreSQL)CVSS 3.14.3
Patch
Available – fixed in 18.7, 17.12, 16.16 +2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
PostgreSQLAffected
  • >=18 <18.7
Fixed in
  • 18.7
PostgreSQLAffected
  • >=17 <17.12
Fixed in
  • 17.12
PostgreSQLAffected
  • >=16 <16.16
Fixed in
  • 16.16
PostgreSQLAffected
  • >=15 <15.20
Fixed in
  • 15.20
PostgreSQLAffected
  • <14.25
Fixed in
  • 14.25

AI-suggested

Upgrading PostgreSQL to versions 18.7, 17.12, 16.16, 15.20, or 14.25 or later will remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2026-116321 is a vulnerability in PostgreSQL involving improper null termination during array element assignment. This flaw allows a database user to disclose server memory by manipulating the final byte of a fixed-length name value, which is then treated as a C string. Versions prior to PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

References

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