What is CVE-2026-40036?

CVE-2026-40036 is a high-severity vulnerability in Obsidianforensics Unfurl, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-04-08.

How severe is CVE-2026-40036?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Obsidianforensics Unfurl

CVE-2026-40036

Unfurl before 2026.04 contains an unbounded zlib decompression vulnerability in parse_compressed.py that allows remote attackers to cause denial of service. Attackers can submit highly compressed payloads via URL parameters to the /json/vi…

EPSS: 0.005 (40.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Obsidianforensics Unfurl — versions 0
Ryandfir Unfurl

Weakness classification (CWE)

References

disclosure@vulncheck.com (Exploit, vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-40036?: CVE-2026-40036 is a high-severity vulnerability in Obsidianforensics Unfurl, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-04-08.
How severe is CVE-2026-40036?: High severity. CVSS v3 base score is 7.5 out of 10.