Denial of Service Vulnerability in OliveTin's OAuth2 Login Handler
CVE-2026-67437

7.5HIGH

Key Information:

Vendor

Olivetin

Status
Olivetin
Vendor
CVE Published:
29 July 2026

What is CVE-2026-67437?

The OliveTin application is vulnerable due to the OAuth2 login handler, which does not manage state correctly for each login attempt. This oversight allows an unauthenticated attacker to exploit the service by flooding it with login requests, leading to unbounded memory consumption and, ultimately, service instability. This vulnerability affects multiple versions of OliveTin from 3000.0.0 through 3000.16.0 and has been addressed in version 3000.17.0.

Affected Version(s)

OliveTin >= 3000.0.0, < 3000.17.0

References

https://github.com/OliveTin/OliveTin/security/advisories/...
x_refsource_CONFIRM
https://github.com/OliveTin/OliveTin/commit/ec114e95d297b...
x_refsource_MISC
https://github.com/OliveTin/OliveTin/releases/tag/3000.17.0
x_refsource_MISC

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

.