VULNERABILITY INTELLIGENCE

CVE-2026-40036

CVSS score7.5 HIGH
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-04-08
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-409

Primary references