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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perl-libwww-perl | Jun 9, 2026 | Jun 9, 2026 |
| Ibm Aix | — | Apply the fix or workaround for aix_vios_advisory | Aug 16, 2026 | Aug 14, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 12, 2026 |
| Ubuntu | — | Upgrade libwww-perl | Jun 4, 2026 | Jun 3, 2026 |
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