What is CVE-2026-85663?

CVE-2026-85663 is a critical-severity vulnerability in Aimhubio Aim, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-09-04.

How severe is CVE-2026-85663?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Aimhubio Aim

CVE-2026-85663

Aim 3.29.1 remote tracking server fails to authenticate requests and dispatches arbitrary methods through getattr without allowlist validation. Unauthenticated attackers can register clients, instantiate Repo resources, and invoke arbitrary methods to read experiments or delete runs.

Vulnerability class: Broken Authentication

Published 2026-09-04 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.4th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002

Affected products

Aimhubio Aim

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/aimhubio/aim (product)
github.com/aimhubio/aim/blob/v3.29.1/aim/ext/transport/server.py (technical-description)
github.com/aimhubio/aim/blob/v3.29.1/aim/ext/transport/tracking.py (technical-description)
github.com/aimhubio/aim/issues/3412 (issue-tracking)
www.vulncheck.com/advisories/aim-3.29.1-remote-code-execution-via-unauthenticat… (third-party-advisory)

Frequently asked questions

What is CVE-2026-85663?: CVE-2026-85663 is a critical-severity vulnerability in Aimhubio Aim, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-09-04.
How severe is CVE-2026-85663?: Critical severity. CVSS v3 base score is 9.8 out of 10.