CVE-2026-28428
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.
- Score
- CVSS 3.1 5.3 Medium
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-03-06
- Last modified
- 2026-03-09
- Weaknesses
- CWE-287
Affected products
References
- https://github.com/Talishar/Talishar/commit/a9c218efa37756c9e7eed056fbff6ee03f79aefc
- https://github.com/Talishar/Talishar/security/advisories/GHSA-2659-p579-wv83
