What’s Vulnerable › Vulnerabilities

CVE-2026-33578: OpenClaw < 2026.3.28 - Sender Policy Allowlist Bypass via Policy Downgrade in Google Chat and Zalouser Extensions

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-31 · updated 2026-07-24
• Weakness: CWE-863

Description

OpenClaw before 2026.3.28 contains a sender policy bypass vulnerability in the Google Chat and Zalouser extensions where route-level group allowlist policies silently downgrade to open policy. Attackers can exploit this policy resolution flaw to bypass sender restrictions and interact with bots despite configured allowlist restrictions.

Affected products

• OpenClaw: before 2026.3.28 — fixed in 2026.3.28

How to fix

Upgrade to a fixed version: OpenClaw 2026.3.28. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/commit/e64a881ae0fb8af18e451163f4c2d611d60cc8e4
• https://github.com/openclaw/openclaw/security/advisories/GHSA-63mg-xp9j-jfcm
• https://www.vulncheck.com/advisories/openclaw-sender-policy-allowlist-bypass-via-policy-downgrade-in-google-chat-and-zalouser-extensions

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