CVE-2026-8368 Information disclosure in LWP::UserAgent
Attackers can steal credentials by triggering cross-origin redirects that leak Authorization headers to malicious hosts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-8368?
CVE-2026-8368 is a medium-severity vulnerability in OALDERS LWP::UserAgent, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-522
Which versions are affected by CVE-2026-8368?
Linux distribution packages (6)
perl-libwww-perl SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 6.31-150000.3.3.1 |
perl-libwww-perl SUSE:Linux Enterprise Server 16.0 | All versions | 6.770.0-160000.3.1 |
perl-libwww-perl SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 6.05-6.3.1 |
perl-libwww-perl SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 6.770.0-160000.3.1 |
perl-libwww-perl openSUSE:Leap 16.0 | All versions | 6.770.0-160000.3.1 |
perl-libwww-perl openSUSE:Tumbleweed | All versions | 6.830.0-1.1 |
How do I fix CVE-2026-8368?
Upgrade to a fixed version.
Is CVE-2026-8368 being exploited?
There is no known exploitation of CVE-2026-8368 in the wild and no public exploit code.
Sources
Also known as AZL-86907, BELL-CVE-2026-8368, DEBIAN-CVE-2026-8368, ECHO-353c-16d7-9c47, GHSA-39wp-j2gg-h44j, MGASA-2026-0150 and 8 more.