Medium 6.1Published Apr 10, 2026

CVE-2026-5774Juju API Server Denial of Service and Authentication Replay via Unsynchronized Token Map

Updated under an hour ago (Oct 27, 2026, 6:50 AM ET)

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It affects Canonical Juju. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Canonical Juju

Exploited in the last 30 days

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: 6.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: canonical
NVD analysis: Analyzed
Record last updated: Apr 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Canonical Juju canonical:juju (from the name)	from 2.0.0 before 2.9.57; from 3.0.0 before 3.6.21; from 4.0.0 before 4.0.6	CNA record
canonical juju canonical:juju	before 2.9.57; from 3.0 before 3.6.21; from 4.0 before 4.0.6	NVD

References

References

https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78	vdb-entry, vendor-advisory, exploit, third-party-advisory
https://github.com/juju/juju/pull/22206	patch, issue-tracking
https://github.com/juju/juju/pull/22205	patch, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.