CVE-2026-40036

HIGH

7.5

Description

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/visjs endpoint that expand to gigabytes, exhausting server memory and crashing the service.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie4/8/2026

Derniere modification4/17/2026

Sourcenvd

Observations honeypot0

Produits affectes

ryandfir:unfurl

Faiblesses (CWE)

CWE-409CWE-770

References

https://github.com/obsidianforensics/unfurl/releases/tag/v2026.04(disclosure@vulncheck.com)

https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression(disclosure@vulncheck.com)

Correlations IOC

Aucune correlation enregistree

This product uses data from the NVD API but is not endorsed or certified by the NVD.