CVE-2026-5774

Juju API Server Denial of Service and Authentication Replay via Unsynchronized Token Map

MEDIUM
6.4
CVSS Score
Published: April 10, 2026 at 12:10 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
2 products affected across 2 vendorsJujuJuju

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.9.573.0 ≤ v < 3.6.214.0 ≤ v < 4.0.62.0.03.0.04.0.0
Affected range stops below 2.9.57, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.21, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.6, so it looks safe — our inference, not a vendor statement
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

VDB EntryVendor AdvisoryExploitThird Party Advisory
Source: cverecord
https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78
PatchIssue Tracking
Source: cverecord
https://github.com/juju/juju/pull/22206
PatchIssue Tracking
Source: cverecord
https://github.com/juju/juju/pull/22205

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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