CVE-2026-57303

Name: CVE-2026-57303
Creator: NVD / NIST
Published: 2026-06-24T14:17:36.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.22%

Last modified Jun 25, 2026

CVE-2026-57303 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS Probability

0.22%

12.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Jenkins	Assembla	<= 1.4

References

https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3692%20(1)Vendor Advisory

Timeline

Published: Jun 24, 2026
Last Modified: Jun 25, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-57303?

How severe is CVE-2026-57303?

CVE-2026-57303 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-57303?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-57303?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST