{"answers":{"affected":"3 open source packages ship an affected version, including github.com/modelcontextprotocol/registry.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44427 exists.","fix":"Upgrade github.com/modelcontextprotocol/registry to 1.7.5 or later.","what":"CVE-2026-44427 is a vulnerability in modelcontextprotocol registry, published on 14 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-44427 and fix it if it is affected.\n\nWhat it is: CVE-2026-44427 is a vulnerability in modelcontextprotocol registry, published on 14 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44427 exists.\n\nAffected packages and fixed versions:\n- github.com/modelcontextprotocol/registry (Go): affected from 1.1.0; fixed in 1.7.5\n- github.com/modelcontextprotocol/registry (Go): affected from 1.1.0; fixed in 1.7.5\n- github.com/modelcontextprotocol/registry (Go): affected from 1.1.0; fixed in 1.7.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-44427/ (Markdown: https://insights.sbomify.com/CVE-2026-44427/index.md)","id":"CVE-2026-44427","markdown":"https://insights.sbomify.com/CVE-2026-44427/index.md","name":"CVE-2026-44427","record":{"aliases":["GHSA-v8vw-gw5j-w7m6","GO-2026-5658"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"MCP Registry","requires_auth":"none","summary":"An attacker can redirect users to malicious external sites via crafted URLs in the MCP Registry, potentially facilitating phishing attacks.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":0,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain. This vulnerability is fixed in 1.7.5.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"MCP Registry: Open Redirect","id":"CVE-2026-44427","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"open_redirect","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"MCP Registry: GitHub OIDC tokens replayable across registry deployments due to shared audience","id":"CVE-2026-44428"},"packages":[{"ecosystem":"Go","fixed":["1.7.5"],"introduced":["1.1.0"],"last_affected":[],"package":"github.com/modelcontextprotocol/registry","purl":null,"source":"GHSA-v8vw-gw5j-w7m6"},{"ecosystem":"Go","fixed":["1.7.5"],"introduced":["1.1.0"],"last_affected":[],"package":"github.com/modelcontextprotocol/registry","purl":"pkg:golang/github.com/modelcontextprotocol/registry","source":"GHSA-v8vw-gw5j-w7m6"},{"ecosystem":"Go","fixed":["1.7.5"],"introduced":["1.1.0"],"last_affected":[],"package":"github.com/modelcontextprotocol/registry","purl":"pkg:golang/github.com/modelcontextprotocol/registry","source":"GO-2026-5658"}],"prev":{"headline":"ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check","id":"CVE-2026-44426"},"products":["registry"],"published":"2026-05-14","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-15","vendors":["modelcontextprotocol"]},"summary":"An attacker can redirect users to malicious external sites via crafted URLs in the MCP Registry, potentially facilitating phishing attacks.","url":"https://insights.sbomify.com/CVE-2026-44427/"}