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CVE-2026-40035

Unfurl through 2025.08 contains an improper input validation vulnerability in config parsing that enables Flask debug mode by default. The debug configuration value is read as a string and passed directly to app.run(), causing any non-empty string to evaluate truthy, allowing attackers to access the Werkzeug debugger and disclose sensitive information or achieve remote code execution.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:89bc09a8235960242b678251cdc3d76c9293c04d7df0ef3e0115528a8337e1a5
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":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","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:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageName":"dfir-unfurl","product":"unfurl","vendor":"obsidianforensics","versions":[{"lessThanOrEqual":"2025.08","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","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:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-489","description":"Active Debug Code","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-vg9h-jx4v-cwx2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/adp/0/references/0
{"name":"GHSA Advisory GHSA-vg9h-jx4v-cwx2","tags":["vendor-advisory"],"url":"https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-vg9h-jx4v-cwx2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /containers/cna/references/0
{"name":"VulnCheck Advisory: dfir-unfurl - Werkzeug Debugger Exposure via String Config Parsing","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/dfir-unfurl-werkzeug-debugger-exposure-via-string-config-parsing"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:70303e5893eeac939112f2c928a7bf958ad6e8cc93dced2d0a5b34bb5f12178a · sha256:48939c5e910914e9… · /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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