CPANSA-libwww-perl-2026-8368: libwww-perl vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2026-05-12T00:00:00 Engine CSAF Perl Toolkit 0.26
Current release date 2026-05-12T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 6.5 Severity
Original language Language en
Also referred to

Vulnerability Description

LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects. On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes. A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.

Vulnerabilities

CVE-2026-8368

Vulnerability Description

LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects.

On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes.

A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.

Weakness CWE-522 : Insufficiently Protected Credentials

Product status

Known affected
Product Score
libwww-perl less than 6.83
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 6.5 Medium
Fixed

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Tue May 12 00:00:00 2026 First release

Sharing rules

TLP:WHITE
For the TLP version see: https://www.first.org/tlp/