CVE-2026-28428 - Talishar: Authentication Bypass via Empty authKey Parameter Allows Unauthenticated Game Actions

CVE-2026-28428 - Talishar: Authentication Bypass via Empty authKey Parameter Allows Unauthenticated Game Actions

https://cvefeed.io/rssfeed/latest.atom / Fri, 03/06/2026 - 08:05
CVE ID : CVE-2026-28428
Published : March 6, 2026, 5:16 a.m. | 40 minutes ago
Description : 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.
Severity: 5.3 | MEDIUM
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