What is CVE-2026-89158?

CVE-2026-89158 is a medium-severity vulnerability in Pcre Pcre2, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-09-11.

How severe is CVE-2026-89158?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Pcre Pcre2

CVE-2026-89158

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/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-2026-89158?: CVE-2026-89158 is a medium-severity vulnerability in Pcre Pcre2, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-09-11.
How severe is CVE-2026-89158?: Medium severity. CVSS v3 base score is 6.5 out of 10.