What’s Vulnerable › Vulnerabilities

CVE-2026-103111

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-10-04
• Weakness: CWE-787

Description

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.

Affected products

• PCRE2: before 10.49 — fixed in 10.49

How to fix

Upgrade to a fixed version: PCRE2 10.49. Check the vendor advisory for mitigations.

References

• https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-r9hj-j2rw-4q3m
• https://lists.debian.org/debian-lts-announce/2026/10/msg00008.html
• https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-r9hj-j2rw-4q3m

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