{"id":"CVE-2026-113877","revision":"0a68883878c54e11889cf1e05e534cff","records":[{"revision":"0a68883878c54e11889cf1e05e534cff","observedAt":"2026-10-23T21:48:20.592+00:00","statement":{"source":"cve-program","id":"CVE-2026-113877","aliases":[],"title":"HTTP::Headers::ActionPack versions before 0.10 for Perl allow CPU exhaustion via Accept-Language ranges matched as regular expressions","description":"HTTP::Headers::ActionPack versions before 0.10 for Perl allow CPU exhaustion via Accept-Language ranges matched as regular expressions.\n\n_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.\n\nA remote attacker can exhaust CPU, or make choose_language die, in any application that passes an untrusted Accept-Language header to it.","state":0,"publishedAt":"2026-10-23T20:07:20.677+00:00","modifiedAt":"2026-10-23T20:07:20.677+00:00","affected":[{"ecosystem":"https://cpan.org/modules","name":"HTTP-Headers-ActionPack","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://cpan.org/modules\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"HTTP::Headers::ActionPack\"\n                    ],\n                    \"packageName\": \"HTTP-Headers-ActionPack\",\n                    \"packageURL\": \"pkg:cpan/HTTP-Headers-ActionPack\",\n                    \"programFiles\": [\n                        \"lib/HTTP/Headers/ActionPack/ContentNegotiation.pm\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"HTTP::Headers::ActionPack::ContentNegotiation::_language_match\"\n                        },\n                        {\n                            \"name\": \"HTTP::Headers::ActionPack::ContentNegotiation::choose_language\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/robrwo/perl-HTTP-Headers-ActionPack/\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"0.10\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://metacpan.org/release/RRWO/HTTP-Headers-ActionPack-0.10/changes","https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2e64befd72750e0f0f4bec9.patch"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113877","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-113877","identifiers":["CVE-2026-113877"]},"retained":false,"historicalAffected":[]}],"coverage":[]}