MLflow security advisory (AV26-832)
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Serial Number: AV26-832 Date: August 19, 2026 As of August 17, 2026, MLflow is affected by vulnerabilities in the following product: MLflow Prior to 3.15.0 On August 19, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-64849 to their Known Exploited Vulnerabilities (KEV) Database. The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available. Release v3.15.0 · mlflow/mlflow · GitHub Unauthenticated full-read SSRF in MLflow webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding) · Advisory · mlflow/mlflow · GitHub CISA KEV: CVE-2026-64849
CSIRTS triage
- What
- Unauthenticated SSRF in webhook validation allows bypassing IP checks via HTTP redirects and DNS rebinding.
- Who is affected
- MLflow deployments before version 3.15.0 with default configuration exposing unauthenticated webhook API.
- Urgency
- Critical; vulnerability is actively exploited and listed in CISA KEV catalog as of August 19, 2026.
- Action
- Upgrade MLflow to version 3.15.0 or later immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://cyber.gc.ca/en/alerts-advisories/mlflow-security-advisory-av26-832
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-64849Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 63% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-64849 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- highexploitedCISA Adds One Known Exploited Vulnerability to Catalogcisa
- criticalexploitedCVE-2026-64849: MLflow Server-Side Request Forgery Vulnerabilitycisa-kev
- criticalexploitedCVE-2026-64849: MLflow is an open source AI engineering platform for agents, large language models, and machin…nvd
- criticalexploitedGHSA-7gwp-5pfp-969j: MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypasse…ghsa
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