What is CVE-2026-40920?

CVE-2026-40920 is a critical-severity vulnerability in Apache Ranger, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-08-10.

How severe is CVE-2026-40920?

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

Auth bypass in Apache Ranger

CVE-2026-40920

Privilege Escalation via URL Parameter is reported in Apache Ranger versions <= 2.8.0. Users are recommended to upgrade to version 2.9.0, which fixes this issue.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-08-10 · last modified 2026-08-17.

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: 0.004 (32.9th percentile), scored 2026-09-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Apache Ranger
Apache Software Foundation Ranger — versions 0

Weakness classification (CWE)

References

lists.apache.org/thread/zh92fob9gqp196rvz3x9t0d2fnq9g27d (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-40920?: CVE-2026-40920 is a critical-severity vulnerability in Apache Ranger, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-08-10.
How severe is CVE-2026-40920?: Critical severity. CVSS v3 base score is 9.8 out of 10.