{"cve":"CVE-2026-53820","nvd":{"published":"2026-06-12T22:16:53.027","modified":"2026-07-23T09:10:00.113","status":"Analyzed","description":"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.","cvss_v4":{"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","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","score":6.6},"cwes":["CWE-862"],"references":["https://github.com/openclaw/openclaw/security/advisories/GHSA-qh2f-99mv-mrcf","https://www.vulncheck.com/advisories/openclaw-exec-denylist-bypass-in-bundle-mcp-loopback-session-spawn"],"products":["openclaw:openclaw"],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-53820","score":0.00094,"percentile":0.00559,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qh2f-99mv-mrcf","url":"https://osv.dev/vulnerability/GHSA-qh2f-99mv-mrcf","summary":"OpenClaw: Bundle MCP loopback could miss its exec denylist on session spawn","modified":"2026-07-16T05:15:13.758042645Z","packages":[{"ecosystem":"npm","name":"openclaw","purl":"pkg:npm/openclaw","ranges":["<2026.5.12"],"fixed":["2026.5.12"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}