CVE-2026-8368LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects
Updated under an hour ago ()
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It affects OALDERS LWP::UserAgent. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-522
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- CPANSec
- NVD analysis
- Deferred
- Record last updated
- May 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OALDERS LWP::UserAgent oalders:lwp_useragent (from the name) | before 6.83 | CNA record |
References
- https://github.com/libwww-perl/libwww-perl/commit/9c4aeb6f2dd32f2b7eaf2d7827cade31ea6cb2c6.patchpatch
- https://metacpan.org/release/OALDERS/libwww-perl-6.83/changesrelease-notes
- https://github.com/libwww-perl/libwww-perl/pull/512issue-tracking
- https://github.com/libwww-perl/libwww-perl/pull/284related
- http://www.openwall.com/lists/oss-security/2026/05/12/7
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.