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TI-2026-28878 Aliases CVE-2026-40035GHSA-92wx-pxch-p9px

Unfurl - Werkzeug Debugger Exposure via String Config Parsing

Priority HIGH 81CWE-489Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00566 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
obsidianforensicsunfurlup to 2025.08—No fix listedCNA
  • unfurl Vendorobsidianforensics Affected up to 2025.08 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ryandfir:unfurl:*:*:*:*:*:*:*:*up to 2025.08VulnerableRyandfir
  • cpe:2.3:a:ryandfir:unfurl:*:*:*:*:*:*:*:* Versions up to 2025.08 Vulnerable ·Ryandfir

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40035
  2. 2026-10-03 Alias added: GHSA-92wx-pxch-p9px
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

  • TI-2026-28879 Unfurl < 2026.04 - Denial of Service via Unbounded zlib Decompression CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences