CVE-2026-57303 json
Jenkins Assembla Plugin has an XXE vulnerability
published 4mo ago modified 17d ago also GHSA-2q27-6p2h-q6r3 , EUVD-2026-38784
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.
Is CVE-2026-57303 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:assembla | <=1.4 |
no fix listed |
Affected products
- Jenkins Project Jenkins Assembla Plugin
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
jenkins.io
/security/advisory/2026-06-24/#SECURITY-3692%20(1)
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-57303
advisory
-
github.com
/lucamilanesio/assembla-jenkins-plugin
package
Sources
- CVE List CVE-2026-57303
- GitHub Advisory GHSA-2q27-6p2h-q6r3
- NVD CVE-2026-57303
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.