What is CVE-2026-89157?

CVE-2026-89157 is a medium-severity vulnerability in Pcre Pcre2, classified under Integer Overflow or Wraparound. CVSS score: 5.7/10. Published 2026-09-11.

How severe is CVE-2026-89157?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Integer overflow in Pcre Pcre2

CVE-2026-89157

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L.

Affected products

Pcre Pcre2

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-89157?: CVE-2026-89157 is a medium-severity vulnerability in Pcre Pcre2, classified under Integer Overflow or Wraparound. CVSS score: 5.7/10. Published 2026-09-11.
How severe is CVE-2026-89157?: Medium severity. CVSS v3 base score is 5.7 out of 10.