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VulnerabilityPublished

CVE-2026-116333: PostgreSQL · Buffer Over-read

Affects PostgreSQLSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 18.7 or 17.12 when convenient.

Data as of 12 Nov 2026, 14:47 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (PostgreSQL)CVSS 3.16.5
Patch
Available – fixed in 18.7, 17.12
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 PostgreSQL to 18.7 or 17.12.

Affected software

ProductAffectedFixed in
PostgreSQLAffected
  • >=18 <18.7
Fixed in
  • 18.7
PostgreSQLAffected
  • >=17 <17.12
Fixed in
  • 17.12

AI-suggested

Upgrade affected PostgreSQL installations to version 17.12 or later if running major version 17, or to version 18.7 or later if running major version 18. These versions contain the official fixes for this vulnerability. No other mitigations are indicated.

Description

CVE-2026-116333 is a buffer over-read vulnerability in PostgreSQL affecting parallel B-tree scans. It allows an object creator to read server memory addresses chosen by an attacker due to a function incorrectly marked as PARALLEL SAFE or STABLE, causing inconsistent scan-key arrays among worker processes. This affects PostgreSQL major versions 17 and 18, specifically versions before 17.12 and 18.7. Versions prior to 17 are not affected. The vulnerability has a CVSS score of 6.5, indicating medium severity.

References

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