GHSA-p536-vvpp-9mc8 OpenClaw has a Web Fetch DoS via unbounded response parsing

• npm openclaw: < 2026.2.15 → fixed in 2026.2.15

Summary The `web_fetch` tool could be used to crash the OpenClaw Gateway process (OOM / resource exhaustion) by fetching and attempting to parse attacker-controlled web pages with oversized response bodies or pathological HTML nesting. Affected Packages / Versions • Package: `openclaw` (npm) • Affected versions: `= 2026.2.15` Impact An attacker can social-engineer a user (or any automation that uses `web_fetch`) into fetching a malicious URL that returns extremely large or deeply nested HTML. The Gateway may exhaust memory or become unresponsive, causing a denial of service. Fix The Gateway now caps the downloaded response body size before any HTML parsing and adds additional guards to avoid running Readability/DOM parsing on pathological HTML. Fix Commit(s) • 166cf6a3e04c7df42bea70a7ad5ce2b9df46d147 Release Process Note This advisory is prepared for the next npm release. Once `[email protected]` is published, publish this advisory without further edits. Thanks @xuemian168 for reporting.