Page generated: 10 Nov 2026, 19:58 UTC
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CVE-2026-64849

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Starting in 3.3.0 and 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…

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MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Starting in 3.3.0 and 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.
CVSS 9.3 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.3/10
REALITY · THREAT PRIORITY
8.4/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.3: +1.40
  • Fresh EPSS: 10.02%: +0.05

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 13 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL3/100

Sources and documents

ZDI: Published Advisories
Technical advisory · 29 Oct 2026, 05:00 · ZDI-26-846: MLflow Webhook Server-Side Request Forgery Vulnerability
ZDI: Published Advisories
Press · 29 Oct 2026, 05:00 · ZDI-26-846: MLflow Webhook Server-Side Request Forgery Vulnerability
shattered.io
Press · 30 Aug 2026, 07:00 · MLflow SSRF Bug Scores 9.3, Lands on CISA KEV [2026] - shattered.io
The Hacker News
Press · 24 Aug 2026, 07:00 · ⚡ Weekly Recap: AI-Powered PLC Attacks, GitLab Attacks, Stripe Key Leaks and More - The Hacker News
Cyber Daily
Press · 24 Aug 2026, 07:00 · Patch now! Hackers targeting critical vulnerability in AI engineering platform MLflow - Cyber Daily
See all 13 source documents
Hackread
Press · 22 Aug 2026, 07:00 · Attackers Exploit Critical Flaw in MLflow, an AI Platform Downloaded 30M Times Monthly - Hackread
SecurityWeek
Press · 20 Aug 2026, 07:00 · MLflow Vulnerability Exploited for Cloud Credential Theft - SecurityWeek
Rescana
Press · 20 Aug 2026, 07:00 · Active Exploitation of MLflow SSRF Vulnerability (CVE-2026-64849) Enables Cloud Credential Theft and Account Compromise - Rescana
BleepingComputer
Press · 20 Aug 2026, 07:00 · CISA warns of hackers exploiting critical MLflow vulnerability - BleepingComputer
Security Affairs
Press · 20 Aug 2026, 07:00 · U.S. CISA adds an MLflow flaw to its Known Exploited Vulnerabilities catalog - Security Affairs
CyberSecurityNews
Press · 18 Aug 2026, 07:00 · Critical MLflow SSRF Vulnerability Exploited by Hackers in the Wild - CyberSecurityNews
The Hacker News
Press · 18 Aug 2026, 07:00 · Attackers Exploit MLflow SSRF Flaw to Steal Cloud Credentials and Secrets - The Hacker News
GBHackers News
Press · 18 Aug 2026, 07:00 · Critical MLflow SSRF Flaw Exploited in the Wild - GBHackers News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.3 · reality 8.4 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 3 repos with metrics
RepositoryStarsForksLanguageUpdated
BiuTrap/CVE-2026-6484900—19 Aug 2026, 01:25
codeb0ssx/CVE-2026-64849-PoC00—18 Aug 2026, 22:23
isaca0315/CVE-2026-64849-poc-lab00Python06 Sep 2026, 19:29
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.3; EPSS 10.0%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 14:00:19.801232+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
17 Aug 2026, 21:16
First press mention
18 Aug 2026, 07:00
Added to the CISA KEV catalog
19 Aug 2026, 00:00
Latest press mention
29 Oct 2026, 05:00
Score calculated
05 Nov 2026, 14:00
PoCs on GitHub
3 repositories