{"cve":"CVE-2026-28394","nvd":{"published":"2026-03-05T22:16:15.973","modified":"2026-06-17T10:28:32.523","status":"Analyzed","description":"OpenClaw versions prior to 2026.2.15 contain a denial of service vulnerability in the web_fetch tool that allows attackers to crash the Gateway process through memory exhaustion by parsing oversized or deeply nested HTML responses. Remote attackers can social-engineer users into fetching malicious URLs with pathological HTML structures to exhaust server memory and cause service unavailability.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-770"],"references":["https://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46d147","https://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8","https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-response-parsing-in-web-fetch-tool"],"products":["openclaw:openclaw"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-28394","score":0.00462,"percentile":0.40082,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p536-vvpp-9mc8","url":"https://osv.dev/vulnerability/GHSA-p536-vvpp-9mc8","summary":"OpenClaw has a Web Fetch DoS via unbounded response parsing","modified":"2026-03-05T22:11:21.125125Z","packages":[{"ecosystem":"npm","name":"openclaw","purl":"pkg:npm/openclaw","ranges":["<2026.2.15"],"fixed":["2026.2.15"]}]}],"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."]}