Unauthenticated data disclosure via forged userId header
Published Aug 26, 2026 · Updated Aug 26, 2026
Incorrect access control in AntFlow 2.0.0 allows remote attackers to read sensitive process data by forging a userId request header. JiMuMDCCommonsRequestLoggingFilter reads identity fields from HTTP headers and registers a nonempty userId as the current user without session or token validation. No credentials or user interaction are required; the demonstrated request impersonates another user to retrieve process-monitoring information.
Summary
What happened
Incorrect access control in AntFlow 2.0.0 allows remote attackers to read sensitive process data by forging a userId request header. JiMuMDCCommonsRequestLoggingFilter reads identity fields from HTTP headers and registers a nonempty userId as the current user without session or token validation. No credentials or user interaction are required; the demonstrated request impersonates another user to retrieve process-monitoring information.
The record
- CVE
- CVE-2026-75415
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-639, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- AntFlow userId header authentication-bypass proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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