CVE-2026-8368
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-8368.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-8368
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 6.83-1 |
| debian | sid | fixed | 6.83-1 |
| debian | trixie | affected | |
| sles | affected | |
References
- https://github.com/libwww-perl/libwww-perl/commit/9c4aeb6f2dd32f2b7eaf2d7827cade31ea6cb2c6.patch
- 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
- https://security-tracker.debian.org/tracker/CVE-2026-8368
- https://www.suse.com/security/cve/CVE-2026-8368.html
CWEs
CWE-522
Verify integrity in audit chain (admin only). AS-IS.