CVE-2026-117621

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{"bugzilla": {"description": "jenkins: Jenkins: Cross-site scripting via workspace browser link computation on agents", "id": "2562979", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562979"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["Jenkins 2.587 and earlier, LTS 2.580.1 and earlier computes on the agent the URL of the link shown in the workspace browser for each file and directory, resulting in a cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.", "A flaw was found in Jenkins. This vulnerability allows a Cross-Site Scripting (XSS) attack because the URLs displayed in the workspace browser for files and directories are computed directly on the build agent. An attacker who controls an agent process can exploit this flaw to inject and execute malicious scripts in the browser session of a user or administrator viewing the workspace."], "name": "CVE-2026-117621", "public_date": "2026-10-28T16:48:34Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-117621\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-117621\nhttps://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4232"], "statement": "This vulnerability is rated as Moderate severity because successful exploitation requires an attacker to already control a build agent, alongside user interaction from an operator browsing the affected workspace. In typical Red Hat deployments where Jenkins manages distributed or containerized agents, the controller isolates build execution, preventing direct server compromise through this vector alone. While script execution within a legitimate user's browser session can lead to privilege escalation, the prerequisite agent compromise and necessary victim navigation restrict the overall impact.", "threat_severity": "Moderate"}

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