CVE-2026-28428
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
2Description
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.
Analysis
Talishar is a fan-made Flesh and Blood project. [CVSS 5.3 MEDIUM]
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Audit authentication configurations.
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External POC / Exploit Code
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