CVE-2026-8368
CWE-522Published: May 12, 2026· Updated: May 12, 2026
Official 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.
Technical Analysis
CVE-2026-8368 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
Exploit & PoC Resources
All References (5)
Quick Facts
Related CVEs (CWE-522)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-8368 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts