What is CVE-2026-63177?

CVE-2026-63177 is a high-severity vulnerability in Cisagov Malcolm, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-08-11.

How severe is CVE-2026-63177?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Cisagov Malcolm

CVE-2026-63177

Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.

Affected products

Cisagov Malcolm — versions < 26.07.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-63177?: CVE-2026-63177 is a high-severity vulnerability in Cisagov Malcolm, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-08-11.
How severe is CVE-2026-63177?: High severity. CVSS v3 base score is 7.1 out of 10.