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{"bugzilla": {"description": "jenkins: Jenkins: Phishing attacks via improper redirect URL validation", "id": "2487545", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487545"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-601", "details": ["Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains relative path segments (`./` or `../`), allowing attackers to perform phishing attacks.", "A flaw was found in Jenkins. The system improperly validates redirect URLs after login, specifically when they contain relative path segments such as `./` or `../`. This vulnerability allows attackers to craft malicious URLs that appear legitimate, leading to successful phishing attacks against users."], "mitigation": {"lang": "en:us", "value": "upgrade to Jenkins 2.568 or LTS 2.555.3"}, "name": "CVE-2026-53436", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Fix deferred", "package_name": "jenkins", "product_name": "OpenShift Developer Tools and Services"}], "public_date": "2026-06-10T13:05:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53436\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53436\nhttps://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755"], "statement": "This Moderate impact flaw in Jenkins, as shipped in OpenShift Developer Tools & Services, allows attackers to conduct phishing attacks. By exploiting improper validation of redirect URLs containing relative path segments, an attacker can craft a malicious link that appears legitimate, deceiving users into revealing sensitive information.", "threat_severity": "Moderate"}