CVE-2026-33576: OpenClaw < 2026.3.28 - Unauthorized Media Download via Zalo Channel

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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 downloads and stores inbound media from Zalo channels before validating sender authorization. Unauthorized senders can force network fetches and disk writes to the media store by sending messages that are subsequently rejected.

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/68ceaf7a5f64a23e78b95eff055e4b497218312a
https://github.com/openclaw/openclaw/security/advisories/GHSA-v2v2-f783-358j
https://www.vulncheck.com/advisories/openclaw-unauthorized-media-download-via-zalo-channel

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