CVE-2026-57281: script security Expression Injection

Description

Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations carrying an extensions member, allowing attackers able to run sandboxed Groovy scripts to execute code outside the sandbox if a suitable script is present on the classpath of the component that evaluates the script.

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CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0059

Probability of exploitation

0.45%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-93 CWE-93

CWE-693 CWE-693

CWE-917 CWE-917

Affected Products

Vendor	Product	Versions
jenkins	script_security	< 1402.v94c9ce464861

References

Advisories & Patches

https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3793

Other References

https://access.redhat.com/security/cve/CVE-2026-57281 https://bugzilla.redhat.com/show_bug.cgi?id=2492200 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57281.json

Frequently Asked Questions

What is CVE-2026-57281? +

Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations carrying an extensions member, allowing attackers able to run sandboxed Groovy scripts to execute code outside the sandbox if a suitable script is present on the classpath of the component that evaluates the script. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-57281? +

CVE-2026-57281 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0059, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-57281? +

CVE-2026-57281 affects products from jenkins, specifically: script_security. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-57281? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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