Server-Side Request Forgery (SSRF) in MLflow - CVE-2026-115886
Published: November 9, 2026
Vulnerability identifier: #VU162802
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-115886
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated attacker to force an MLflow tracking server to send HTTP requests to arbitrary hosts with attacker-controlled headers and bodies.
The vulnerability exists due to unconstrained constructor arguments in third-party scorer deserialization when the optional trulens and trulens-providers-litellm packages are installed. An unauthenticated attacker can submit crafted scorer JSON to the scorer invocation endpoint on a server without authentication to trigger server-side requests from its network position.
Affected software
MLflow
How to mitigate CVE-2026-115886
Install security update from vendor's website.
MLflow - update to 3.17.0