Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
mlflow mlflow/mlflow — Environment Variable Resolution Vulnerability in mlflow/mlflow
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N C H N N 7.7 .0043 36.5 —
AFFECTED
Product Versions Fixed
mlflow/mlflow unspecified – —
TIMELINE
Mar 12 Reserved by @huntr_ai
Jun 3 EXPLOIT PUBLISHED — CVE-2026-4035 (mlflow/mlflow). Public exploit reference added.
Jun 3 Published (CNA: @huntr_ai)
Aug 14 EXPLOIT PUBLISHED — CVE-2026-4035 (mlflow/mlflow). Public exploit reference added.
Aug 14 RESCORED — CVE-2026-4035 (mlflow/mlflow). CVSS 9.1 → 7.7 (NVD).
Description
A vulnerability in mlflow/mlflow versions prior to 3.11.0 allows for the resolution of environment variables in AI Gateway secrets, which can be exploited to exfiltrate sensitive server-side environment credentials to an attacker-controlled endpoint. This issue arises because the `api_key` field in gateway secrets can accept `$ENV_VAR` references, which are resolved against the MLflow server's environment during runtime. The resolved secrets are then sent in provider authentication headers to the configured upstream `api_base`. This vulnerability can be exploited by low-privileged authenticated users in basic-auth deployments or by unauthenticated users in default deployments without `basic-auth`. The impact includes potential leakage of sensitive credentials such as cloud artifact credentials (`AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`), which could lead to artifact poisoning and cross-boundary code execution in downstream environments. The issue is fixed in version 3.11.0.
Lifecycle
Complete event history — 5 events, chronological
| Date | Event | Detail |
|---|
| March 12, 2026 | Reserved | Reserved by @huntr_ai |
| June 3, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-4035 (mlflow/mlflow). Public exploit reference added. |
| June 3, 2026 | Published | Published (CNA: @huntr_ai) |
| August 14, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-4035 (mlflow/mlflow). Public exploit reference added. |
| August 14, 2026 | RESCORED | RESCORED — CVE-2026-4035 (mlflow/mlflow). CVSS 9.1 → 7.7 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| mlflow | mlflow/mlflow | — | unspecified | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-4035 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.