CVE-2026-63177: Malcolm < 26.07.0

CVE-2026-63177. CVSS 3.1 base score 7.1 (HIGH, Vendor/CNA). EPSS 0.00369 (percentile 0.29562), scored 22-Oct-2026.

Affected technology

Malcolm · < 26.07.0
cisagov

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Vendor/CNA’s CVSS 4.0 assessment (base score 7.1/10) rates confidentiality impact as high; integrity impact as low; availability impact as none.

Published 24-Oct-2026 01:44 UTC

CWE: CWE-863
CCR priority: 28.5 /100 (P4)
CVSS 3.1: 7.1 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N · Vendor/CNA
EPSS: 0.00369 · percentile 0.29562 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-63177.html