ET WEB_SPECIFIC_APPS Alibaba fastjson2 Remote Code Execution (CVE-2026-16723)

7.0.3 5.0SID: 2071344Rev: 1Enabled17 views

Fileemerging-web_specific_apps.rules

CreatedJuly 29, 2026

UpdatedJuly 29, 2026

Classificationweb-application-attack

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Alibaba fastjson2 Remote Code Execution (CVE-2026-16723)"; reference:url,fearsoff.org/research/fastjson-1-2-83-rce; reference:cve,2026-16723; classtype:web-application-attack; sid:2071344; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_07_29, cve CVE_2026_16723, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Exploit, updated_at 2026_07_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)

Detection details are hidden.

References

url	fearsoff.org/research/fastjson-1-2-83-rce
cve	2026-16723

Metadata

attack targetServer

tls stateTLSDecrypt

created at2026_07_29

cve

CVE-2026-16723

deploymentSSLDecrypt

confidenceMedium

signature severityMajor

tagExploit

updated at2026_07_29

mitre tactic idTA0001

mitre tactic nameInitial_Access

mitre technique idT1190

mitre technique nameExploit_Public_Facing_Application

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