What it is
CVE-2026-64849 is an unauthenticated vulnerability affecting mlflow mlflow. MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2026-64849
mlflow Server-Side Request Forgery
mlflow / mlflow · affected before 3.15.0
- Severity
- CVSS 9.3 · Critical
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- —
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
mlflow / mlflow affected before 3.15.0.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
MLflow is an open source AI engineering platform for agents, large language models, and machine learning models
MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body.
This issue is fixed in version 3.15.0.
Vendor
Product
Affected
Status
mlflow
mlflow
Before 3.15.0
Affected
- Published
- 17 Aug 2026
- Exploitation Reported
- 18 Aug 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-64849
- https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j github.com · CVE Record https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j
- https://github.com/mlflow/mlflow/issues/24179 github.com · CVE Record https://github.com/mlflow/mlflow/issues/24179
- https://github.com/mlflow/mlflow/pull/24258 github.com · CVE Record https://github.com/mlflow/mlflow/pull/24258
- https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 github.com · CVE Record https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cf...
- https://github.com/mlflow/mlflow/releases/tag/v3.15.0 github.com · CVE Record https://github.com/mlflow/mlflow/releases/tag/v3.15.0
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
Watchtower Labs
Independent exploitation attestation added to the KEV Intelligence record.
Proof of concept available
GitHub Advisory Database
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| Watchtower Labs First | 2026-08-18 13:31 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
9.3
Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
EPSS
—
Weaknesses
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j
ghsa · Created Unknown · AI assessment 90%
MLflow: Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)
Timeline
From disclosure to observed exploitation
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
Added to the KEV Intelligence watchlist
Added to the KEV Intelligence curated list for closer monitoring
-
Public PoC available
Public proof-of-concept code published
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2026-64849
Free JSON includes basic KEV fields{
"cve_id": "CVE-2026-64849",
"confidence": "High",
"cvss_score": 9.3,
"cvss_estimated": false,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.