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vuln-cve/data/2026/100xxx/CVE-2026-100858.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-100858",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-09-27T00:20:03.854Z",
"datePublished": "2026-09-27T01:28:49.185Z",
"dateUpdated": "2026-09-30T15:41:51.178Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-09-27T01:28:49.185Z"
},
"datePublic": "2026-09-12T00:00:00.000Z",
"title": "heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes",
"descriptions": [
{
"lang": "en",
"value": "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)."
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Server-Side Request Forgery (SSRF)",
"cweId": "CWE-918",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "heymrun",
"product": "heym",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "semver",
"lessThan": "0.0.109"
},
{
"version": "0.0.109",
"status": "unaffected",
"versionType": "semver"
}
]
}
],
"metrics": [
{
"format": "CVSS",
"cvssV4_0": {
"version": "4.0",
"vectorString": "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",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 7.6,
"baseSeverity": "HIGH"
}
},
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM"
}
}
],
"references": [
{
"url": "https://github.com/heymrun/heym/security/advisories/GHSA-39j3-6x3x-8rcr",
"tags": [
"vendor-advisory"
],
"name": "GitHub Security Advisory (GHSA-39j3-6x3x-8rcr)"
},
{
"name": "VulnCheck Advisory: heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/heym-before-0.0.109-server-side-request-forgery-via-workflow-nodes"
}
],
"credits": [
{
"lang": "en",
"value": "unbengable12",
"type": "reporter"
},
{
"lang": "en",
"value": "mbakgun",
"type": "finder"
}
],
"x_generator": {
"engine": "vulncheck-endgame"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/heymrun/heym/security/advisories/GHSA-39j3-6x3x-8rcr",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-30T15:41:43.926464Z",
"id": "CVE-2026-100858",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-30T15:41:51.178Z"
}
}
]
}
}