CVE-2026-5774: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Canonical Juju
Improper synchronization of the userTokens map in the API server in Canonical Juju 4.0.5, 3.6.20, and 2.9.56 may allow an authenticated user to possibly cause a denial of service on the server or possibly reuse a single-use discharge token.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-5774) in Canonical Juju arises from improper synchronization (race condition) in managing the userTokens map within the API server. This flaw affects Juju versions 2.0.0, 3.0.0, and 4.0.0 and may allow an authenticated user with low privileges to cause denial of service or reuse a token intended for single use. The CVSS 4.0 score is 6.1 (medium), reflecting network attack vector, high impact on availability, and requiring privileges but no user interaction. No official patch or remediation level has been published by the vendor as of the data provided.
Potential Impact
An authenticated user could exploit this race condition to disrupt the API server's availability (denial of service) or bypass intended single-use token restrictions by reusing discharge tokens. This could affect service reliability and token security within the affected Juju versions. There is no evidence of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor for updates from Canonical. No vendor-provided mitigation or temporary workaround is currently documented.
CVE-2026-5774: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Canonical Juju
Description
Improper synchronization of the userTokens map in the API server in Canonical Juju 4.0.5, 3.6.20, and 2.9.56 may allow an authenticated user to possibly cause a denial of service on the server or possibly reuse a single-use discharge token.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-5774) in Canonical Juju arises from improper synchronization (race condition) in managing the userTokens map within the API server. This flaw affects Juju versions 2.0.0, 3.0.0, and 4.0.0 and may allow an authenticated user with low privileges to cause denial of service or reuse a token intended for single use. The CVSS 4.0 score is 6.1 (medium), reflecting network attack vector, high impact on availability, and requiring privileges but no user interaction. No official patch or remediation level has been published by the vendor as of the data provided.
Potential Impact
An authenticated user could exploit this race condition to disrupt the API server's availability (denial of service) or bypass intended single-use token restrictions by reusing discharge tokens. This could affect service reliability and token security within the affected Juju versions. There is no evidence of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor for updates from Canonical. No vendor-provided mitigation or temporary workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-04-08T07:22:06.115Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d9d97c1cc7ad14da3f88ce
Added to database: 4/11/2026, 5:17:48 AM
Last enriched: 4/11/2026, 5:20:30 AM
Last updated: 5/26/2026, 1:36:50 PM
Views: 114
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