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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-40036

Unfurl < 2026.04 - Denial of Service via Unbounded zlib Decompression

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

obsidianforensics unfurl

Default version status: unaffected

  • 0 to < 2026.04affected
pkg:pypi/dfir-unfurl

References