Integer Wraparound Vulnerability in PostgreSQL 32-bit Builds
CVE-2026-14677

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
13 August 2026

What is CVE-2026-14677?

An integer wraparound vulnerability exists in PostgreSQL 32-bit builds of pltcl and plperl, allowing an object creator to manipulate the server's memory allocation process. By providing specially crafted function bodies, an attacker can induce an undersized memory allocation that may lead to out-of-bounds writes. This vulnerability poses a serious risk as it could enable the execution of arbitrary code under the privileges of the operating system user running the database. Users are advised to update to versions PostgreSQL 18.5, 17.11, 16.15, 15.19, or 14.24 to safeguard against this threat.

Affected Version(s)

PostgreSQL 18 < 18.5

PostgreSQL 17 < 17.11

PostgreSQL 16 < 16.15

References

https://www.postgresql.org/support/security/CVE-2026-14677/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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