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Message-ID: <262440af-c81c-434f-9497-c9f6e7156f2f@cpansec.org>
Date: Thu, 20 Aug 2026 19:16:25 +0100
From: Robert Rothenberg <rrwo@...nsec.org>
To: cve-announce@...urity.metacpan.org, oss-security@...ts.openwall.com
Subject: CVE-2026-15743: Catalyst::Plugin::Static::Simple versions through
0.38 for Perl mark responses as publicly cacheable
========================================================================
CVE-2026-15743 CPAN Security Group
========================================================================
CVE ID: CVE-2026-15743
Distribution: Catalyst-Plugin-Static-Simple
Versions: through 0.38
MetaCPAN: https://metacpan.org/dist/Catalyst-Plugin-Static-Simple
VCS Repo:
https://github.com/perl-catalyst/Catalyst-Plugin-Static-Simple
Catalyst::Plugin::Static::Simple versions through 0.38 for Perl mark
responses as publicly cacheable
Description
-----------
Catalyst::Plugin::Static::Simple versions through 0.38 for Perl mark
responses as publicly cacheable.
The _serve_static method always sets the Cache-Control header to
"public", with no means of overriding it. This advises proxies that
the content may be stored in a shared cache, and may be reused in
responses to requests from other users. (This includes requests with an
Authorization header.)
Configuring the expires time to "0" to disable caching, as documented,
is ignored.
Problem types
-------------
- CWE-524 Use of Cache Containing Sensitive Information
Workarounds
-----------
Apply the patch, and configure the default Cache-Control as needed.
For deployments that cannot apply the patch, a method modifier of
_serve_static in the Catalyst class can be used to override the
Cache-Control or Expires headers as needed.
References
----------
https://github.com/perl-catalyst/Catalyst-Plugin-Static-Simple/pull/3
https://security.metacpan.org/patches/C/Catalyst-Plugin-Static-Simple/0.38/CVE-2026-15743-r1.patch
https://datatracker.ietf.org/doc/html/rfc9111
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