{"schema":"threatline.record/2","record":{"id":"CVE-2026-100858","aliases":["GHSA-39j3-6x3x-8rcr"],"summary":"heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes","details":"heym before 0.0.109 contains a server-side request forgery vulnerability in the Slack, Discord, and Crawler workflow nodes. These nodes issue HTTP requests to URLs taken from user-created credentials (webhook_url / flaresolverr_url) using an unguarded HTTP client, bypassing the SSRF egress guard that already protects the HTTP, WebSocket, and MCP nodes; the credential API validates only that the URL is non-empty. Any registered user can create a credential pointing at an internal address and execute a workflow, causing the backend to reach loopback, private, link-local, or cloud-metadata endpoints and return the full response body in the node output (non-blind SSRF).","categories":["Unclassified"],"product":"heym","vendor":"heymrun","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100858","source_modified_at":"2026-09-30T15:41:51.178Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"heym","vendor":"heymrun","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"0.0.109"},{"version":"0.0.109","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100858","source_modified_at":"2026-09-30T15:41:51.178Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"heym","ecosystem":null},"version":"0.0.109","basis":"first unaffected version stated in the CVE record"}],"cvss":7.6,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00268,"percentile":0.17987,"score_date":"2026-10-23"},"published_at":"2026-09-27T01:28:49.185Z","modified_at":"2026-09-30T15:41:51.178Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100858","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-30T15:41:51.178Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100858","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/heymrun/heym/security/advisories/GHSA-39j3-6x3x-8rcr","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/heym-before-0.0.109-server-side-request-forgery-via-workflow-nodes","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-09-30T15:41:43.926464Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-30T15:41:51.178Z","content_hash":"83f5e164ee38a3d7cbe952512343d9b5dd08c7735b53b94637bf0be6fffa3510"}}