CVE-2026-5774 json
Juju API Server Denial of Service and Authentication Replay via Unsynchronized Token Map
published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also GHSA-7m55-2hr4-pw78 , GO-2026-5228 , EUVD-2026-21366
- cvss
- 6.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/juju/juju 0.0.0-20260408003526-d395054dc2c3
- Canonical Juju 2.9.57, 3.6.21, 4.0.6
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
- github.com/juju/juju#22206 pull request
- github.com/juju/juju#22205 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.1 | 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 |
| CNA | 4.0 | 6.0 | 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/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 |
| NVD | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H |
| GitHub | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/juju/juju | <0.0.0-20260408003526-d395054dc2c3 |
0.0.0-20260408003526-d395054dc2c3 |
Affected products
- Canonical Juju
Classification
- Weakness
-
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
References
-
github.com
/juju/juju/pull/22206
patch, issue-tracking, web
-
github.com
/juju/juju/pull/22205
patch, issue-tracking, web
-
github.com
/juju/juju/security/advisories/GHSA-7m55-2hr4-pw78
vdb-entry, vendor-advisory, exploit, web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-5774
advisory
-
github.com
/juju/juju
package
Sources
- CVE List CVE-2026-5774
- GitHub Advisory GHSA-7m55-2hr4-pw78
- NVD CVE-2026-5774
- OSV GO-2026-5228
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