CVE-2026-120147 PUBLISHED

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

Assigner: PostgreSQL
Reserved: 30.10.2026 Published: 12.11.2026 Updated: 12.11.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Product Status

Vendor n/a
Product PostgreSQL
Versions Default: unaffected
  • affected from 18 to 18.7 (excl.)
  • affected from 17 to 17.12 (excl.)
  • affected from 16 to 16.16 (excl.)
  • affected from 15 to 15.20 (excl.)
  • affected from 0 to 14.25 (excl.)

Affected Configurations

Superuser previously issued "CREATE EXTENSION dblink". Attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema).

Credits

  • The PostgreSQL project thanks 안지용 for reporting this problem.

References

Problem Types

  • Use After Free CWE