{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79786","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-25T14:32:37.763Z","datePublished":"2026-08-25T18:23:14.494Z","dateUpdated":"2026-08-28T22:33:16.534Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-08-25T18:23:14.494Z"},"datePublic":"2026-07-01T00:00:00.000Z","title":"Coroot 1.20.2 through 1.24.5 Unvalidated Redirect URI in MCP OAuth Client Registration","descriptions":[{"lang":"en","value":"Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their authorization codes upon consent approval, and exchange them for access tokens to hijack MCP sessions."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"URL Redirection to Untrusted Site ('Open Redirect')","cweId":"CWE-601","type":"CWE"}]}],"affected":[{"vendor":"coroot","product":"coroot","collectionURL":"https://github.com/coroot/coroot","repo":"https://github.com/coroot/coroot","packageURL":"pkg:golang/github.com/coroot/coroot","defaultStatus":"unaffected","versions":[{"version":"1.20.2","lessThanOrEqual":"1.24.5","status":"affected","versionType":"semver"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/coroot/coroot","tags":["product"]},{"url":"https://github.com/coroot/coroot/issues/929","tags":["issue-tracking"]},{"url":"https://github.com/coroot/coroot/blob/v1.24.5/api/mcp_oauth.go","tags":["technical-description"]},{"name":"VulnCheck Advisory: Coroot 1.20.2 through 1.24.5 Unvalidated Redirect URI in MCP OAuth Client Registration","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/coroot-1.20.2-through-1.24.5-unvalidated-redirect-uri-in-mcp-oauth-client-registration"}],"credits":[{"lang":"en","value":"George Chen","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"references":[{"url":"https://github.com/coroot/coroot/issues/929","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T22:32:54.593010Z","id":"CVE-2026-79786","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-28T22:33:16.534Z"}}]}}