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CVE-2026-120147

PostgreSQL dblink reentrant disconnect use-after-free executes arbitrary code

Severity
High 8.8
Published
12 Nov 2026
Last changed
12 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
14.25, 15.20, 16.16, 17.12, 18.7
Weakness
Use after free (CWE-416)
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Sources
CVE Program

Description

Use after free in the PostgreSQL dblink extension allows an object creator to execute arbitrary code as the operating system user running the database, via type conversion code that re-enters dblink and closes a connection whose results an outer dblink call is reading. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

From the CVE Program.

Affected software

SoftwareAffected versions
PostgreSQLServers and applications · cna:n/a|postgresql
  • Every version before 14.25
  • From 15 before 15.20
  • From 16 before 16.16
  • From 17 before 17.12
  • From 18 before 18.7

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-120147