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CVE-2026-56274

Flowise before 3.1.2 contains multiple OS command injection vulnerabilities in the Custom MCP Server feature due to incomplete command-flag validation and a regex bypass in local file access restrictions. An attacker with a Flowise account of any role, or API access with view/update permissions for chatflows, can configure a malicious MCP server to bypass the validateCommandFlags blocklist (for example, 'docker build' is not blocked, and 'npx --yes' is not blocked while only '-y' is) and the val
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7ae0cc5d933ca83bec0498b8ed237f4ad4b8c9391f1eb809e20bd1767c9bdbc9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","packageURL":"pkg:npm/flowise-components","product":"Flowise Components","vendor":"Flowise","versions":[{"lessThan":"3.1.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.1.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/affected/1

{"defaultStatus":"unaffected","packageURL":"pkg:npm/flowise","product":"Flowise","vendor":"Flowise","versions":[{"lessThan":"3.1.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.1.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"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:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","packageURL":"pkg:npm/flowise-components","product":"Flowise Components","vendor":"Flowise","versions":[{"lessThan":"3.1.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.1.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/affected/1
{"defaultStatus":"unaffected","packageURL":"pkg:npm/flowise","product":"Flowise","vendor":"Flowise","versions":[{"lessThan":"3.1.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.1.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"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:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-78","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m99r-2hxc-cp3q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-m99r-2hxc-cp3q)","tags":["vendor-advisory"],"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m99r-2hxc-cp3q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Flowise - Remote Code Execution via MCP Security Bypass in validateCommandFlags and validateArgsForLocalFileAccess","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/flowise-remote-code-execution-via-mcp-security-bypass-in-validatecommandflags-and-validateargsforlocalfileaccess"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e0ae5a0e1711691bd9ad0ce67dd22216e4a1a6015d3cb434ad6ab762159445d5 · sha256:9cbe587635156a59… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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