CVE-2026-105699 (GCVE-0-2026-105699)
Vulnerability from cvelistv5
Published
2026-10-05 20:37
Modified
2026-10-08 02:26
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. read_resource forwarded the attacker-controlled URI to handle_read_resource, which parsed a flow_id and filename and called storage_service.get_file without verifying that the flow belonged to the authenticated user or current project. A user with access to any project-scoped MCP endpoint could therefore request another user's flow-backed file, while global handle_list_resources and handle_list_tools behavior could disclose flow and file identifiers that made targeting easier. The vulnerability disclosed uploaded documents, structured data, prompts, and other private flow artifacts across tenants but did not modify victim files or stored flows. This issue is fixed in version 1.9.1.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| langflow-ai | langflow |
Version: >= 1.6.8, <= 1.9.0 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-105699",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T02:26:20.768713Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T02:26:48.618Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "langflow",
"vendor": "langflow-ai",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.6.8, \u003c= 1.9.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. read_resource forwarded the attacker-controlled URI to handle_read_resource, which parsed a flow_id and filename and called storage_service.get_file without verifying that the flow belonged to the authenticated user or current project. A user with access to any project-scoped MCP endpoint could therefore request another user\u0027s flow-backed file, while global handle_list_resources and handle_list_tools behavior could disclose flow and file identifiers that made targeting easier. The vulnerability disclosed uploaded documents, structured data, prompts, and other private flow artifacts across tenants but did not modify victim files or stored flows. This issue is fixed in version 1.9.1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-05T20:37:59.630Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c"
},
{
"name": "https://github.com/langflow-ai/langflow/pull/12818",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/langflow-ai/langflow/pull/12818"
},
{
"name": "https://github.com/langflow-ai/langflow/commit/b8fe970493fd5fb2e1fc71dfccc79f90b76058fa",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/langflow-ai/langflow/commit/b8fe970493fd5fb2e1fc71dfccc79f90b76058fa"
},
{
"name": "https://github.com/langflow-ai/langflow/commit/f0fd436fe9829192ee550e6cb46961a01dd37032",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/langflow-ai/langflow/commit/f0fd436fe9829192ee550e6cb46961a01dd37032"
},
{
"name": "https://github.com/langflow-ai/langflow/releases/tag/v1.9.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/langflow-ai/langflow/releases/tag/v1.9.1"
}
],
"source": {
"advisory": "GHSA-4hmc-cfm3-w43c",
"discovery": "UNKNOWN"
},
"title": "Langflow: Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-105699",
"datePublished": "2026-10-05T20:37:59.630Z",
"dateReserved": "2026-10-05T17:48:58.627Z",
"dateUpdated": "2026-10-08T02:26:48.618Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-105699\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-08T02:26:20.768713Z\"}}}], \"references\": [{\"url\": \"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-08T02:26:42.752Z\"}}], \"cna\": {\"title\": \"Langflow: Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers\", \"source\": {\"advisory\": \"GHSA-4hmc-cfm3-w43c\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"langflow-ai\", \"product\": \"langflow\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.6.8, \u003c= 1.9.0\"}]}], \"references\": [{\"url\": \"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c\", \"name\": \"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4hmc-cfm3-w43c\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/langflow-ai/langflow/pull/12818\", \"name\": \"https://github.com/langflow-ai/langflow/pull/12818\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/langflow-ai/langflow/commit/b8fe970493fd5fb2e1fc71dfccc79f90b76058fa\", \"name\": \"https://github.com/langflow-ai/langflow/commit/b8fe970493fd5fb2e1fc71dfccc79f90b76058fa\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/langflow-ai/langflow/commit/f0fd436fe9829192ee550e6cb46961a01dd37032\", \"name\": \"https://github.com/langflow-ai/langflow/commit/f0fd436fe9829192ee550e6cb46961a01dd37032\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/langflow-ai/langflow/releases/tag/v1.9.1\", \"name\": \"https://github.com/langflow-ai/langflow/releases/tag/v1.9.1\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. read_resource forwarded the attacker-controlled URI to handle_read_resource, which parsed a flow_id and filename and called storage_service.get_file without verifying that the flow belonged to the authenticated user or current project. A user with access to any project-scoped MCP endpoint could therefore request another user\u0027s flow-backed file, while global handle_list_resources and handle_list_tools behavior could disclose flow and file identifiers that made targeting easier. The vulnerability disclosed uploaded documents, structured data, prompts, and other private flow artifacts across tenants but did not modify victim files or stored flows. This issue is fixed in version 1.9.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"CWE-639: Authorization Bypass Through User-Controlled Key\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-10-05T20:37:59.630Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-105699\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-08T02:26:48.618Z\", \"dateReserved\": \"2026-10-05T17:48:58.627Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-10-05T20:37:59.630Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…