Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The mlflow PyPI package before 3.17.2 has a path traversal flaw in its FileStore tracking backend, which accepts crafted trace IDs. An unauthenticated attacker who can reach the server can use such IDs to write trace metadata files outside the intended experiment directory, limited by the server process's filesystem permissions. Upgrade to mlflow 3.17.2, which contains the fix; FileStore was the default before 3.7.0, so earlier deployments are affected without special configuration.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0063, the 50th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 19 Oct 2026, 21:05 UTC Confirmed by the CVE List
- 19 Oct 2026, 22:17 UTC Confirmed by NVD
- 31 Oct 2026, 14:07 UTC First seen by agentprime
- 31 Oct 2026, 14:07 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wqmh-qccw-pqwf
- OSV: GHSA-wqmh-qccw-pqwf
- nvd.nist.gov/vuln/detail/CVE-2026-53995
- github.com/mlflow/mlflow/issues/26979
- github.com/mlflow/mlflow/pull/26842
- github.com/mlflow/mlflow/commit/31ff9e56f5038d61ec75344518912945f60dffec
- github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal
- github.com/mlflow/mlflow/releases/tag/v3.17.2
- www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api