139 lines
6.0 KiB
JSON
139 lines
6.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-67546",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-07-29T18:47:17.074Z",
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"datePublished": "2026-11-11T21:41:03.020Z",
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"dateUpdated": "2026-11-12T17:54:44.721Z"
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},
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"containers": {
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"cna": {
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"title": "Heym: Command execution via POST /api/mcp/fetch-tools stdio transport: supplied command is spawned before MCP validation",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-94",
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"lang": "en",
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"description": "CWE-94: Improper Control of Generation of Code",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 8.8,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/heymrun/heym/security/advisories/GHSA-378x-q589-34mv",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/heymrun/heym/security/advisories/GHSA-378x-q589-34mv"
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},
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{
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"name": "https://github.com/heymrun/heym/commit/22b8ee60eb92128cf4ff04a9b6c0e1b62bf25a01",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/heymrun/heym/commit/22b8ee60eb92128cf4ff04a9b6c0e1b62bf25a01"
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},
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{
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"name": "https://github.com/heymrun/heym/commit/6c6213f88dfa8b2a70d23a9a271171241e910904",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/heymrun/heym/commit/6c6213f88dfa8b2a70d23a9a271171241e910904"
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},
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{
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"name": "https://github.com/heymrun/heym/releases/tag/v0.0.75",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/heymrun/heym/releases/tag/v0.0.75"
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}
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],
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"affected": [
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{
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"vendor": "heymrun",
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"product": "heym",
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"versions": [
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{
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"version": "< 0.0.75",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-11-11T21:41:03.020Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.75, the same POST /api/mcp/fetch-tools endpoint (any authenticated user, lowest role) also accepts the stdio transport, which spawns the attacker-supplied command with attacker-supplied args and an environment merged over os.environ. The process executes on the shared backend host before MCP protocol validation fails — so side effects fire regardless of whether the command speaks MCP. This is a distinct weakness class and exploit primitive from the SSRF (Advisory 2) on the same endpoint, and needs a different fix (role gating / opt-in trust boundary rather than egress controls). This issue has been patched in version 0.0.75."
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}
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],
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"source": {
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"advisory": "GHSA-378x-q589-34mv",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-11-12T16:31:22.524253Z",
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"id": "CVE-2026-67546",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-12T17:54:44.721Z"
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}
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}
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]
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}
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} |