mlflow - Unvalidated Gateway Secret api_base Enables SSRF via Gateway Proxy Endpoint

published 2026-08-05 3 mo ago modified 2026-09-10 1 mo ago also GHSA-h7x2-h6g9-p789 , PYSEC-2026-3865 , EUVD-2026-53208

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

MLflow's AI Gateway accepts an auth_config.api_base value when creating a gateway secret (mlflow/server/handlers.py, _create_gateway_secret) with no validation of scheme, host, or IP range; the value is stored verbatim. The gateway proxy endpoint (mlflow/server/gateway_api.py, raw_proxy) subsequently issues an HTTP request to that stored api_base plus a caller-supplied path and returns the full response body.

Patch / fix

links 1

github.com/mlflow/mlflow@96b7d90 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-71211 updated 2026-08-27 cvss 6.5

mlflow: MLflow: Server-Side Request Forgery via unvalidated AI Gateway secret allows information disclosure

Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-core-bff-rhel9, rhoai/odh-eval-hub-rhel9, rhoai/odh-rhel9-operator, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, +37 more
affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 3 mo ago (2026-08-05)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
GitHub	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
OSV	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
pypi	mlflow	>=3.13.0, <=3.15.2	no fix listed

Affected products

mlflow mlflow

Classification

Weakness

CWE-918 Server-Side Request Forgery

References

github.com /mlflow/mlflow/commit/96b7d900e14227e0821981409d86f5fb6c59b386
web
github.com /mlflow/mlflow/tree/v3.14.0/mlflow
third-party-advisory, web
nvd.nist.gov /vuln/detail/CVE-2026-71211
advisory
github.com /mlflow/mlflow
package
pypi.org /project/mlflow
package
github.com /advisories/GHSA-h7x2-h6g9-p789
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary