CVE-2026-81509

01/תיאור (מקור, אנגלית)

nforwardauth is a forward auth service that allows the use of a single authentication middleware for multiple sites. Versions prior to 1.5.1 accept an unvalidated `r` query parameter on the `/login` endpoint and use them as the post-authentication redirect destination. An unauthenticated attacker can create a legitimate `nforwardauth` login URL that redirects a victim to an attacker-controlled website after the victim successfully authenticates. This issue may facilitate phishing and other social-engineering attacks by abusing the trust associated with the legitimate authentication domain. This vulnerability does not provide an unauthenticated ForwardAuth bypass. Version 1.5.1 contains a patch.

02/קישורים4

• github.com/nosduco/nforwardauth/commit/664f2602f9e1459558d1c4c‮…
• github.com/nosduco/nforwardauth/pull/71
• github.com/nosduco/nforwardauth/releases/tag/v1.5.1
• github.com/nosduco/nforwardauth/security/advisories/GHSA-q64r-‮…