CVE-2026-53820CWE-862

OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn

Medium · published June 12, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
3.0
In the wild
Unconfirmed
What it is

OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
EPSS
0.00140 · 3.0th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-06-12T21:56Z
EPSS history
Timeline
  • 12 JUN 21:56Z
    OpenClaw < 2026.5.12 - Exec Denylist Bypass in Bundle MCP Loopback Session Spawn
    cvelistv5