High severity · published Jul 29, 2026
CVE-2026-67437
OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth)
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
OliveTin gives access to predefined shell commands from a web interface. From 3000.0.0 until 3000.17.0, the service/internal/auth/otoauth2/restapi_auth_oauth2.go OAuth2 login handler stores per-login state in the registeredStates map on every /oauth/login request without expiring, deleting, or bounding entries, allowing an unauthenticated attacker to exhaust memory and cause a denial of service. This issue is fixed in version 3000.17.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OL
OliveTin · OliveTin
>= 3000.0.0, < 3000.17.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67437
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-67437
github.com
https://github.com/OliveTin/OliveTin/commit/ec114e95d297b806c3ca0c37bc139b3c9c517b3f
github.com
https://github.com/OliveTin/OliveTin/releases/tag/3000.17.0
github.com
https://github.com/OliveTin/OliveTin/security/advisories/GHSA-xpxj-f2fm-rqch
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