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Atomicorp WAF Rule 398121

Rule Summary

  • Rule ID: 398121
  • Status: Active
  • Alert message: Atomicorp.com WAF Rules: JFrog Artifactory anonymous token exposure via trailing-slash auth bypass (CVE-2026-42018); breaks the CVE-2026-42016 scope-escalation chain
  • Observed CWEs: None documented
  • Revision: 1
  • Rule severity: Critical (2)
  • Phase: 2 (request body)
  • Request surfaces: Request URI
  • Rule action: deny
  • HTTP status: 403
  • Public tags: CVE-2026-42016, CVE-2026-42018, artifactory
  • Logging: log, auditlog

Description

This rule detects behavior identified by its current alert as “JFrog Artifactory anonymous token exposure via trailing-slash auth bypass (CVE-2026-42018); breaks the CVE-2026-42016 scope-escalation chain” in the request URI. It evaluates during the request body phase and denies matching traffic with HTTP status 403.

CVEs Referenced by This Rule

The current ModSecurity rule metadata explicitly names the following CVEs. These references explain the rule author’s association; they do not claim that the rule is limited to these vulnerabilities or that this is an exhaustive coverage list.

CVE-2026-42016

JFrog Artifactory (Self Hosted) versions before 7.133.11 are vulnerable to a privilege escalation attack due to a validation check of the token signature/issuer and not the token’s scope.

CVE-2026-42018

JFrog Artifactory could return an internal anonymous-user token to an unauthenticated caller when anonymous access is disabled, potentially exposing sensitive resources.

This is a selected list of documented research observations, not an exhaustive coverage matrix. Absence of a CVE does not imply absence of protection.

No selected related public CVE research notes are currently published.