CVE-2026-89156 Memory corruption in PCRE2

Low 2.9 Published 11 Sep 2026 Updated 14 Sep 2026

An out-of-bounds read in PCRE2 allows attackers to cause denial of service or disclose information via invalid UTF data.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-89156?

CVE-2026-89156 is a low-severity memory corruption vulnerability in PCRE2, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.

Weakness: CWE-125

Which versions are affected by CVE-2026-89156?

It affects 1 product.

Products include Pcre Pcre2.

How do I fix CVE-2026-89156?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-89156 being exploited?

There is no known exploitation of CVE-2026-89156 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2026-89156, AZL-100065, AZL-101754, AZL-101796, AZL-101808, AZL-101820 and 7 more.