CVE-2026-14677 PUBLISHED

PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound

Assigner: PostgreSQL
Reserved: 03.07.2026 Published: 13.08.2026 Updated: 13.08.2026

Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 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 18.5 (excl.)
  • affected from 17 to 17.11 (excl.)
  • affected from 16 to 16.15 (excl.)
  • affected from 15 to 15.19 (excl.)
  • affected from 0 to 14.24 (excl.)

Affected Configurations

Attacker has permission to "CREATE EXTENSION plperl" or "CREATE EXTENSION pltcl"; alternatively, another user previously issued one of those. Attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema).

Credits

  • The PostgreSQL project thanks Tulya Project, Team Dhiutsa, Bitecope Technologies Private Ltd for reporting this problem.

References

Problem Types

  • Integer Overflow or Wraparound CWE