{"api_version":"1","generated_at":"2026-10-24T08:00:56+00:00","cve":"CVE-2026-113877","urls":{"html":"https://cve.report/CVE-2026-113877","api":"https://cve.report/api/cve/CVE-2026-113877.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-113877","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-113877"},"summary":{"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":"PUBLISHED","assigner":"CPANSec","published_at":"2026-10-23 21:17:21","updated_at":"2026-10-23 23:17:42"},"problem_types":["CWE-624","CWE-624 CWE-624 Executable Regular Expression Error"],"metrics":[],"references":[{"url":"https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2e64befd72750e0f0f4bec9.patch","name":"https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2e64befd72750e0f0f4bec9.patch","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://metacpan.org/release/RRWO/HTTP-Headers-ActionPack-0.10/changes","name":"https://metacpan.org/release/RRWO/HTTP-Headers-ActionPack-0.10/changes","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/23/27","name":"http://www.openwall.com/lists/oss-security/2026/10/23/27","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-113877","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113877","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"Upgrade to HTTP-Headers-ActionPack 0.10 or later.","time":"","lang":"en"}],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2026-10-23T23:06:45.441Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"http://www.openwall.com/lists/oss-security/2026/10/23/27"}],"title":"CVE Program Container"}],"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["HTTP::Headers::ActionPack"],"packageName":"HTTP-Headers-ActionPack","packageURL":"pkg:cpan/HTTP-Headers-ActionPack","programFiles":["lib/HTTP/Headers/ActionPack/ContentNegotiation.pm"],"programRoutines":[{"name":"HTTP::Headers::ActionPack::ContentNegotiation::_language_match"},{"name":"HTTP::Headers::ActionPack::ContentNegotiation::choose_language"}],"repo":"https://github.com/robrwo/perl-HTTP-Headers-ActionPack/","versions":[{"lessThan":"0.10","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-624","description":"CWE-624 Executable Regular Expression Error","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-23T20:07:20.677Z","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec"},"references":[{"tags":["release-notes"],"url":"https://metacpan.org/release/RRWO/HTTP-Headers-ActionPack-0.10/changes"},{"tags":["patch"],"url":"https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2e64befd72750e0f0f4bec9.patch"}],"solutions":[{"lang":"en","value":"Upgrade to HTTP-Headers-ActionPack 0.10 or later."}],"source":{"discovery":"UNKNOWN"},"title":"HTTP::Headers::ActionPack versions before 0.10 for Perl allow CPU exhaustion via Accept-Language ranges matched as regular expressions","x_generator":{"engine":"cpansec-cna-tool 0.1"}}},"cveMetadata":{"assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","assignerShortName":"CPANSec","cveId":"CVE-2026-113877","datePublished":"2026-10-23T20:07:20.677Z","dateReserved":"2026-10-20T20:16:52.798Z","dateUpdated":"2026-10-23T23:06:45.441Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 21:17:21","lastModifiedDate":"2026-10-23 23:17:42","problem_types":["CWE-624","CWE-624 CWE-624 Executable Regular Expression Error"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"113877","Ordinal":"1","Title":"HTTP::Headers::ActionPack versions before 0.10 for Perl allow CP","CVE":"CVE-2026-113877","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"113877","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"HTTP::Headers::ActionPack versions before 0.10 for Perl allow CP"}]}}}