Medium severity · published Apr 10, 2026
CVE-2026-5774
Juju API Server Denial of Service and Authentication Replay via Unsynchronized Token Map
6.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JU
Juju · Canonical
2.0.0 before 2.9.57; 3.0.0 before 3.6.21; 4.0.0 before 4.0.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5774
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5774
Issue Tracking
https://github.com/juju/juju/pull/22205
Issue Tracking
https://github.com/juju/juju/pull/22206
Exploit
https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78
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