CVE-2026-5774
Juju API Server Denial of Service and Authentication Replay via Unsynchronized Token Map
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.
INFO
Published Date :
April 10, 2026, 1:16 p.m.
Last Modified :
April 22, 2026, 8:46 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | cc1ad9ee-3454-478d-9317-d3e869d708bc | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Canonical Juju to the latest version.
- Apply vendor patches for affected versions.
- Review synchronization logic for token handling.
Public PoC/Exploit Available at Github
CVE-2026-5774 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5774.
| URL | Resource |
|---|---|
| https://github.com/juju/juju/pull/22205 | Issue Tracking |
| https://github.com/juju/juju/pull/22206 | Issue Tracking |
| https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 | Exploit Third Party Advisory |
| https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5774 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5774
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5774 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5774 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H Added CPE Configuration OR *cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* versions up to (excluding) 2.9.57 *cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 3.6.21 *cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (excluding) 4.0.6 Added Reference Type Canonical Ltd.: https://github.com/juju/juju/pull/22205 Types: Issue Tracking Added Reference Type Canonical Ltd.: https://github.com/juju/juju/pull/22206 Types: Issue Tracking Added Reference Type CISA-ADP: https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 Types: Exploit, Third Party Advisory Added Reference Type Canonical Ltd.: https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 Types: Exploit, Third Party Advisory -
New CVE Received by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-362 Added Reference https://github.com/juju/juju/pull/22205 Added Reference https://github.com/juju/juju/pull/22206 Added Reference https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 10, 2026
Action Type Old Value New Value Added Reference https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78