What is CVE-2026-35620?

CVE-2026-35620 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-04-10.

How severe is CVE-2026-35620?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Openclaw

CVE-2026-35620

OpenClaw before 2026.3.24 contains missing authorization vulnerabilities in the /send and /allowlist chat command handlers. The /send command allows non-owner command-authorized senders to change owner-only session delivery policy settings, and the /allowlist mutating commands fail to enforce operator.admin scope. Attackers with operator.write scope can invoke /send on|off|inherit to persistently mutate the current session's sendPolicy, and execute /allowlist add commands to modify config-backed allowFrom entries and pairing-store allowlist entries without proper admin authorization.

Vulnerability class: Broken Access Control

Published 2026-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (42.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Openclaw — versions 0, 2026.3.24

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

github.com/openclaw/openclaw/security/advisories/GHSA-39mp-545q-w789 (Exploit, vendor-advisory, Mitigation, Vendor Advisory, third-party-advisory)
github.com/openclaw/openclaw/security/advisories/GHSA-vqvg-86cc-cg83 (Exploit, vendor-advisory, Mitigation, Vendor Advisory, third-party-advisory)
github.com/openclaw/openclaw/commit/ccfeecb6887cd97937e33a71877ad512741e82b2 (Patch, patch)
github.com/openclaw/openclaw/commit/ea018a68ccb92dbc735bc1df9880d5c95c63ca35 (Patch, patch)
github.com/openclaw/openclaw/commit/555b2578a8cc6e1b93f717496935ead97bfbed8b (Patch, patch)
www.vulncheck.com/advisories/openclaw-missing-authorization-in-send-and-allowli… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-35620?: CVE-2026-35620 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-04-10.
How severe is CVE-2026-35620?: Medium severity. CVSS v3 base score is 5.4 out of 10.