CVE-2026-116316 PUBLISHED

PostgreSQL security-restricted operations can create types in pg_temp, which later queries of the session find

Assigner: PostgreSQL
Reserved: 26.10.2026 Published: 12.11.2026 Updated: 12.11.2026

Improper protection of alternate path in PostgreSQL security-restricted operations allows an object creator to execute arbitrary SQL as the operation's caller, via a domain, enum, or range type created in pg_temp. The victim session must later run a query containing an unqualified type name, e.g. "SELECT '1'::bigint"; autovacuum and other common security-restricted operation users do not do so, so they are unaffected. 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

victim session runs a security-restricted operation, then a regular query with unqualified type names

Credits

  • The PostgreSQL project thanks Anthropic OSS program for reporting this problem.

References

Problem Types

  • Improper Protection of Alternate Path CWE