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CVE-2026-116333

PostgreSQL parallel B-tree array scan reads beyond array bounds

Severity
Medium 6.5
Published
12 Nov 2026
Last changed
12 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
17.12, 18.7
Exploit chance
0.4% in the next 30 daysHigher than 31% of CVEs. EPSS by FIRST, 13 Nov 2026
Weakness
CWE-126
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Read data
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Sources
CVE Program

Description

Buffer over-read in PostgreSQL parallel B-tree scans allows an object creator to read attacker-chosen server-memory addresses, via a function incorrectly marked PARALLEL SAFE or STABLE to make participating workers build different scan-key arrays. Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected. Versions before PostgreSQL 17 are unaffected.

From the CVE Program.

Affected software

SoftwareAffected versions
PostgreSQLServers and applications · cna:n/a|postgresql
  • From 17 before 17.12
  • From 18 before 18.7

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-116333