CVE-2026-28428 — Talishar: Authentication Bypass via Empty authKey Parameter Allows Unauthenticated Game Actions
Talishar is a fan-made Flesh and Blood project. Prior to commit a9c218e, an authentication bypass vulnerability in Talishar's game endpoint validation logic allows any unauthent…
Published: 2026-03-06 · CVSS: 5.3 · CVSS 3.1
Talishar is a fan-made Flesh and Blood project. Prior to commit a9c218e, an authentication bypass vulnerability in Talishar's game endpoint validation logic allows any unauthenticated attacker to perform authenticated game actions — including sending chat messages and submitting game inputs — by supplying an empty authKey parameter (authKey=). The server-side validation uses a loose comparison that accepts an empty string as a valid credential, while correctly rejecting non-empty but incorrect keys. This asymmetry means the authentication mechanism can be completely bypassed without knowing any valid token. This issue has been patched in commit a9c218e.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7