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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/libwww-perl/libwww-perl/commit/9c4aeb6f2dd32f2b7eaf2d7827cade
- https://github.com/libwww-perl/libwww-perl/pull/284
- https://github.com/libwww-perl/libwww-perl/pull/512
- https://metacpan.org/release/OALDERS/libwww-perl-6.83/changes
- http://www.openwall.com/lists/oss-security/2026/05/12/7
FAQ
What is CVE-2026-8368?
CVE-2026-8368 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 i...
How severe is CVE-2026-8368?
CVE-2026-8368 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8368?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.