Unauthenticated service interruption via unbounded OAuth2 state map
Published Jul 29, 2026 · Updated Jul 29, 2026
Uncontrolled resource consumption in OliveTin before 3000.17.0 allows remote attackers to interrupt service via OAuth2 login requests. HandleOAuthLogin inserts a new entry into registeredStates for every request, while the callback neither deletes entries nor applies an expiry or size bound. Any configured OAuth2 provider exposes the unauthenticated endpoint; repeated requests permanently consume memory until degradation or an out-of-memory termination.
Summary
What happened
Uncontrolled resource consumption in OliveTin before 3000.17.0 allows remote attackers to interrupt service via OAuth2 login requests. HandleOAuthLogin inserts a new entry into registeredStates for every request, while the callback neither deletes entries nor applies an expiry or size bound. Any configured OAuth2 provider exposes the unauthenticated endpoint; repeated requests permanently consume memory until degradation or an out-of-memory termination.
The record
- CVE
- CVE-2026-67437
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Vendor
- OliveTin
- Product
- OliveTin
- Classifications
- CWE-770, CWE-400, CWE-401, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 29, 2026CVE publishedPublication date reported by the CVE source.
- Jul 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 3000.0.0, < 3000.17.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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