{"id":"CVE-2026-100858","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).","aliases":["GHSA-39j3-6x3x-8rcr"],"modified":"2026-09-28T03:48:31.127428263Z","published":"2026-09-27T01:28:49.185Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100858.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-918"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100858.json"},{"type":"ADVISORY","url":"https://github.com/heymrun/heym/security/advisories/GHSA-39j3-6x3x-8rcr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100858"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/heym-before-0.0.109-server-side-request-forgery-via-workflow-nodes"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/heymrun/heym","events":[{"introduced":"0"},{"fixed":"1ed1471e978a6a1a526bc796208bb3d38ec54eb3"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"fixed":"0.0.109"}]}}],"versions":["v0.0.108","v0.0.107","v0.0.106","v0.0.105","v0.0.104","v0.0.103","v0.0.102","v0.0.101","v0.0.100","v0.0.99","v0.0.98","v0.0.97","v0.0.96","v0.0.95","v0.0.94","v0.0.93","v0.0.92","v0.0.91","v0.0.90","v0.0.89","v0.0.88","v0.0.87","v0.0.86","v0.0.85","v0.0.84","v0.0.83","v0.0.82","v0.0.81","v0.0.79","v0.0.80","v0.0.78","v0.0.77","v0.0.76","v0.0.75","v0.0.74","0.0.73","v0.0.72","opencode-pr-assets","0.0.71","codex-pr-assets","0.0.70","v0.0.69","v0.0.68","v0.0.67","v0.0.66","v0.0.65","v0.0.64","v0.0.63","v0.0.62","v0.0.61","v0.0.60","v0.0.59","v0.0.58","v0.0.57","v0.0.56","v0.0.55","v0.0.54","v0.0.53","v0.0.52","v0.0.51","v0.0.50","v.0.0.49","v0.0.48","v0.0.47","v0.0.46","v0.0.45","v0.0.44","v0.0.43","v0.0.42","v0.0.41","v0.0.40","v0.0.39","v0.0.38","v0.0.37","v0.0.36","v0.0.35","v0.0.34","v0.0.33","v0.0.32","v0.0.31","v0.0.30","v0.0.29","v0.0.27","v0.0.26","v0.0.25","v0.0.24","v0.0.23","v0.0.22","v0.0.21","v0.0.20","v0.0.19","v0.0.18","v0.0.17","v0.0.16","v0.0.15","v0.0.14","v0.0.13","v0.0.12","v0.0.11","v0.0.10","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100858.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}