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CVE-2026-56356

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4b2c074e99f7e79173fde5b0ca5f864876d7bed185d4338e298efb5f435b5dc2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"2.14.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.14.1","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/1

{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"2.13.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.13.3","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/2

{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"1.123.27","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"1.123.27","versionType":"semver"},{"lessThan":"2.13.3","status":"affected","version":"2.0.0-rc.0","versionType":"semver"},{"status":"unaffected","version":"2.13.3","versionType":"semver"},{"lessThan":"2.14.1","status":"affected","version":"2.14.0","versionType":"semver"},{"status":"unaffected","version":"2.14.1","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

3 source assertions
{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"2.14.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.14.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/1
{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"2.13.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.13.3","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/2
{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n","versions":[{"lessThan":"1.123.27","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"1.123.27","versionType":"semver"},{"lessThan":"2.13.3","status":"affected","version":"2.0.0-rc.0","versionType":"semver"},{"status":"unaffected","version":"2.13.3","versionType":"semver"},{"lessThan":"2.14.1","status":"affected","version":"2.14.0","versionType":"semver"},{"status":"unaffected","version":"2.14.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"GitHub Security Advisory (GHSA-3c7f-5hgj-h279)","tags":["vendor-advisory"],"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-3c7f-5hgj-h279"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /containers/cna/references/0
{"name":"VulnCheck Advisory: n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-chat-trigger-node-custom-css-field"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:20b349af83edc1967721ada83385f49f60076c64cb63447af7dfc8c2093bb85c · sha256:23e994164df94593… · /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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