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Date: Sat, 24 Oct 2026 09:43:30 +0200
From: Salvatore Bonaccorso <carnil@debian.org>
To: submit@bugs.debian.org
Subject: libhttp-headers-actionpack-perl: CVE-2026-113877
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Source: libhttp-headers-actionpack-perl
Version: 0.09-4
X-Debbugs-CC: team@security.debian.org
Severity: important
Tags: security upstream

Hi,

The following vulnerability was published for libhttp-headers-actionpack-perl.

CVE-2026-113877[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-113877
    https://www.cve.org/CVERecord?id=CVE-2026-113877
[1] https://lists.security.metacpan.org/cve-announce/msg/44584817/
[2] https://github.com/robrwo/perl-HTTP-Headers-ActionPack/commit/77f0deb23f3de872c2e64befd72750e0f0f4bec9

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]