CVE-2026-5774

Medium

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.

SeverityMedium

CVSS6.4

Exploit probability—

ProductCanonical Juju

PublishedApr 10, 2026

First seenApr 10, 2026

Weakness typeCWE-362Race condition

How to fix

Update

canonical juju2.9.57, 3.6.21, 4.0.6 or later
github.com/juju/juju0.0.0-20260408003526-d395054dc2c3 or later

Patches

Vendor advisories

github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78

Affected products

Product	Affected versions	Fixed in
canonical juju	v < 2.9.57, 3.0 ≤ v < 3.6.21, 4.0 ≤ v < 4.0.6	2.9.57, 3.6.21, 4.0.6
github.com/juju/jujuGo	v < 0.0.0-20260408003526-d395054dc2c3	0.0.0-20260408003526-d395054dc2c3

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