What is CVE-2026-13737?

CVE-2026-13737 is a critical-severity vulnerability in Commvault, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-08-11.

How severe is CVE-2026-13737?

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

Auth bypass in Commvault

CVE-2026-13737

CommServe contained an allowlist bypass vulnerability affecting command execution authorization. Software customers upgrade to resolved maintenance release. Update all Commvault installations, including Commserve, Webserver, Command Center, Media Agents, Clients and HyperScale X.

Vulnerability class: Broken Access Control

Published 2026-08-11 · last modified 2026-09-09.

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: 0.005 (41.9th percentile), scored 2026-09-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% 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: 0.005 · change: +0.001

Affected products

Commvault
Commvault Cloud — versions 11.46.0, 11.44.0, 11.40.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

050066fd-a2f9-4f32-ab5d-4c53f48bc333 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-13737?: CVE-2026-13737 is a critical-severity vulnerability in Commvault, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-08-11.
How severe is CVE-2026-13737?: Critical severity. CVSS v3 base score is 9.8 out of 10.