# MLflow: Unauthenticated full-read SSRF in webhook delivery: \_validate_webhook_url bypassed via unvalidated HTTP redirects (and DNS rebinding)

Advisory record · `GHSA-7gwp-5pfp-969j`

- **Identifiers:** `GHSA-7gwp-5pfp-969j` · `BIT-mlflow-2026-64849` · `CVE-2026-64849` · `PYSEC-2026-3687`
- **State:** Confirmed
- **Severity:** CVSS 9.3 Critical
- **Critical:** Yes: KEV, CVSS 9+, CVSS 7+ and EPSS
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 17 Aug 2026
- **Updated:** 2 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 Aug 2026, 21:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- In CISA’s KEV catalogue since 19 Aug 2026: it is known to be exploited.
- CVSS score 9.3: 9.0 or more.
- CVSS score 9.3 (7.0 or more) and EPSS 0.10 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `mlflow` (PyPI): affected `>=3.3.0, <3.15.0`; fixed in `3.15.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.3 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Listed since 19 Aug 2026: known to be exploited.
- **EPSS:** 0.10, the 95th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7gwp-5pfp-969j)

## Sources

- [GitHub Advisory Database: GHSA-7gwp-5pfp-969j](https://github.com/advisories/GHSA-7gwp-5pfp-969j)
- [OSV: GHSA-7gwp-5pfp-969j](https://osv.dev/vulnerability/GHSA-7gwp-5pfp-969j)
- <https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-64849>
- <https://github.com/mlflow/mlflow/issues/24179>
- <https://github.com/mlflow/mlflow/pull/24258>
- <https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939>
- <https://github.com/advisories/GHSA-7gwp-5pfp-969j>
- <https://github.com/mlflow/mlflow>
- <https://github.com/mlflow/mlflow/releases/tag/v3.15.0>
- <https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-3687.yaml>
- <https://pypi.org/project/mlflow>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7gwp-5pfp-969j>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-7gwp-5pfp-969j/>. Everything for agents: <https://agentprime.io/llms.txt>.