ET WEB_SPECIFIC_APPS Citrix Netscaler SAML IDP Memory Overread (CVE-2026-3055) M2

Query · suricata

flow:established,to_server;
flowbits:set,ET.Citrix_NS.CVE_2026_3055;
http.uri; bsize:19;
content:"/wsfed/passive?wctx"; fast_pattern;
http.method;
content:"GET";
target:dest_ip;

Rule dependencies

Feeds into

  • 1 rule read ET.Citrix_NS.CVE_2026_3055 · view all
Raw source ET WEB_SPECIFIC_APPS Citrix Netscaler SAML IDP Memory Overread (CVE-2026-3055) M2 · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Citrix Netscaler SAML IDP Memory Overread (CVE-2026-3055) M2";
    flow:established,to_server;
    flowbits:set,ET.Citrix_NS.CVE_2026_3055;
    http.uri; bsize:19;
    content:"/wsfed/passive?wctx"; fast_pattern;
    http.method;
    content:"GET";
    reference:url,labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/;
    reference:cve,2026-3055;
    classtype:web-application-attack;
    sid:2068632; rev:1;
    metadata:affected_product Citrix, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2026_04_08, cve CVE_2026_3055, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, updated_at 2026_04_08;
    target:dest_ip;
)

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