CVE-2026-57304: Jenkins Assembla Plugin has a missing permission check

June 24, 2026 (updated September 25, 2026)

Jenkins Assembla Plugin 1.4 and earlier does not perform a permission check in an HTTP endpoint that tests the connection to an Assembla server.

This allows attackers with Overall/Read permission to connect to an attacker-specified URL using an attacker-specified username and password.

Additionally, this HTTP endpoint does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.

As of publication of this advisory, there is no fix.

References

github.com/advisories/GHSA-2r5w-jh6g-8hff
nvd.nist.gov/vuln/detail/CVE-2026-57304
www.jenkins.io/security/advisory/2026-06-24/

Code Behaviors & Features

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