Authenticated metadata disclosure via unfiltered model search
Published May 21, 2026 · Updated May 21, 2026
Improper access control in MLflow before 3.10.0 allows remote authenticated users to read restricted model-version metadata. The REST SearchModelVersions handler returns unfiltered results because no post-request permission filter applies, while GraphQL omits equivalent protected-field filtering. Basic authentication must be enabled; any account can enumerate names, descriptions, source URIs, tags, and other metadata for models it cannot otherwise read.
Summary
What happened
Improper access control in MLflow before 3.10.0 allows remote authenticated users to read restricted model-version metadata. The REST SearchModelVersions handler returns unfiltered results because no post-request permission filter applies, while GraphQL omits equivalent protected-field filtering. Basic authentication must be enabled; any account can enumerate names, descriptions, source URIs, tags, and other metadata for models it cannot otherwise read.
The record
- CVE
- CVE-2026-2734
- Published
- May 21, 2026
- Updated
- May 21, 2026
- Vendor
- MLflow Project
- Product
- MLflow
- Classifications
- CWE-284, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 21, 2026CVE publishedPublication date reported by the CVE source.
- May 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <3.10.0
What conditions does exploitation require?
What is affected?
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.
Public exploit references
- Huntr SearchModelVersions authorization-bypass proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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