CVE-2026-28789 HIGH

CVE-2026-28789: OliveTin: Unauthenticated DoS via concurrent map writes in OAuth2 state handling

Vendor Olivetin
Product OliveTin
Weakness CWE-362
Published March 5, 2026
Last update March 6, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

OliveTin gives access to predefined shell commands from a web interface. Prior to version 3000.10.3, an unauthenticated denial-of-service vulnerability exists in OliveTin’s OAuth2 login flow. Concurrent requests to /oauth/login can trigger unsynchronized access to a shared registeredStates map, causing a Go runtime panic (fatal error: concurrent map writes) and process termination. This allows remote attackers to crash the service when OAuth2 is enabled. This issue has been patched in version 3000.10.3.

Key dates

02Disclosure timeline

March 5, 2026 CVE published
March 6, 2026 Record updated