Unauthenticated Denial-of-Service Vulnerability in OliveTin OAuth2 Login
CVE-2026-28789

7.5HIGH

Key Information:

Vendor

Olivetin

Status
Olivetin
Vendor
CVE Published:
5 March 2026

What is CVE-2026-28789?

OliveTin's OAuth2 login flow is susceptible to an unauthenticated denial-of-service vulnerability. Before version 3000.10.3, the service's handling of concurrent requests to the /oauth/login endpoint could lead to a Go runtime panic due to unsynchronized access to a shared resource. Attackers could exploit this flaw by sending simultaneous login requests which would trigger a failure in the application, effectively causing it to crash when OAuth2 is enabled. This vulnerability has been addressed in the latest version, making it crucial for users to upgrade to maintain service integrity.

Affected Version(s)

OliveTin < 3000.10.3

References

https://github.com/OliveTin/OliveTin/security/advisories/...
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https://github.com/OliveTin/OliveTin/commit/f044d90d5525c...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.