Vulnerability Description
HTTP::Headers::ActionPack versions before 0.10 for Perl allow CPU exhaustion via Accept-Language ranges matched as regular expressions. _language_match interpolates each Accept-Language range into the pattern `/^$range\-/i` without escaping it, so regular expression syntax in the header reaches the regex engine. A 12-byte range such as `(a?|b?){26}z` backtracks for seconds, and each increment of the quantifier doubles the time. An invalid range such as `(` fails to compile. A remote attacker can exhaust CPU, or make choose_language die, in any application that passes an untrusted Accept-Language header to it.
Related Weaknesses (CWE)
References
- https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2
- https://metacpan.org/release/RRWO/HTTP-Headers-ActionPack-0.10/changes
- http://www.openwall.com/lists/oss-security/2026/10/23/27
FAQ
What is CVE-2026-113877?
CVE-2026-113877 is a documented vulnerability. HTTP::Headers::ActionPack versions before 0.10 for Perl allow CPU exhaustion via Accept-Language ranges matched as regular expressions. _language_match interpolates each Accept-Language range into th...
How severe is CVE-2026-113877?
CVSS scoring is not yet available for CVE-2026-113877. Check NVD for updates.
Is there a patch for CVE-2026-113877?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.