ET WEB_SPECIFIC_APPS Jenkins Arbitrary File Read via Unsafe XStream Deserialization (CVE-2026-53435)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Jenkins Arbitrary File Read via Unsafe XStream Deserialization (CVE-2026-53435)";
    flow:established,to_server;
    http.uri;
    content:"/view/"; startswith;
    content:"/properties/0/"; fast_pattern; distance:0;
    isdataat:1,relative;
    reference:url,cyberpress.org/jenkins-rce-vulnerability/;
    classtype:web-application-attack;
    sid:2069967; rev:1;
    metadata:affected_product Jenkins, attack_target Server, tls_state TLSDecrypt, created_at 2026_06_16, cve CVE_2026_53435, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_06_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)