{"cve":"CVE-2026-42260","nvd":{"published":"2026-05-12T15:16:15.150","modified":"2026-10-26T18:10:00.173","status":"Deferred","description":"Open-WebSearch is a multi-engine MCP server, CLI, and local daemon for agent web search and content retrieval. Prior to 2.1.7, isPublicHttpUrl / assertPublicHttpUrl in src/utils/urlSafety.ts do not recognize bracketed IPv6 literals and do not resolve DNS, which combine to allow non-blind SSRF with the response body returned to the caller. This vulnerability is fixed in 2.1.7.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":8.2},"cwes":["CWE-918"],"references":["https://github.com/Aas-ee/open-webSearch/security/advisories/GHSA-v228-72c7-fx8j","https://github.com/Aas-ee/open-webSearch/security/advisories/GHSA-v228-72c7-fx8j"],"products":[],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-42260","score":0.00215,"percentile":0.11815,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-v228-72c7-fx8j","url":"https://osv.dev/vulnerability/GHSA-v228-72c7-fx8j","summary":"open-websearch has SSRF in `fetchWebContent` MCP tool: bracketed IPv6 literals and non-resolving hostname check bypass `isPrivateOrLocalHostname`","modified":"2026-05-13T16:38:44.560796Z","packages":[{"ecosystem":"npm","name":"open-websearch","purl":"pkg:npm/open-websearch","ranges":["<2.1.7"],"fixed":["2.1.7"]}]}],"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."]}