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CVE-2026-63765

Chatwoot before 4.16.0 contains an authentication bypass vulnerability in the direct uploads controller that allows unauthenticated attackers to create arbitrary ActiveStorage blobs in any tenant account. Attackers can exploit missing authentication checks to resolve any account and conversation, then obtain signed PUT URLs to write arbitrary data to the application's storage backend.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d40261643d738f6a361a88c0eabc0db49eb64ea217744908b20e1acafeeb58f9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"N…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:npm/chatwoot/chatwoot","product":"chatwoot","repo":"https://github.com/chatwoot/chatwoot","vendor":"chatwoot","versions":[{"lessThan":"4.16.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"N…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-306","description":"Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/chatwoot/chatwoot/commit/8dd0d08322edafaec24624b72ed2f6045921cb7b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/references/3
{"name":"Researcher Disclosure","tags":["technical-description","exploit","issue-tracking"],"url":"https://github.com/chatwoot/chatwoot/issues/15072"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/references/0
{"name":"Pull Request","tags":["issue-tracking","patch"],"url":"https://github.com/chatwoot/chatwoot/pull/15039"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/references/2
{"name":"Chatwoot 4.16.0 Release Notes","tags":["release-notes","patch"],"url":"https://github.com/chatwoot/chatwoot/releases/tag/v4.16.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/chatwoot-unauthenticated-activestorage-direct-upload-arbitrary-blob-creation"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bc2edbf1fdea0b66d05147ab703affd106f133678dfd2ed2c351aa94a21ff53 · sha256:73c08cc7deefae1f… · /containers/cna/references/4

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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