Cross-Site Request Forgery Vulnerability in Jenkins Software

CVE-2026-84649

What is CVE-2026-84649?

A security flaw exists in Jenkins software that affects several versions of the Stapler. This vulnerability allows an attacker to exploit the HTTP endpoint that serves dynamically generated JavaScript resources. By embedding the user's CSRF token as a string literal, attackers who control a page on the same site can access valid tokens for the targeted user's session. This could enable malicious actions on behalf of the user without their consent, underscoring the importance of secure token management and site integrity.

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