High severity8.2GHSA Advisory· Published May 12, 2026· Updated May 14, 2026

CVE-2026-42260

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
open-websearchnpm	< 2.1.7	2.1.7

Affected products

Aas Ee/Open WebsearchGHSA
Range: <= 2.1.6
ghsa-coords
pkg:npm/open-websearch
Range: < 2.1.7

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-v228-72c7-fx8jghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-42260ghsaADVISORY
github.com/Aas-ee/open-webSearch/security/advisories/GHSA-v228-72c7-fx8jnvdWEB

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cvss	0.533
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000