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CVE-2026-40036

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CVE-2026-40036

Published: Apr 8, 2026

Modified: May 14, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

VendorProductVersions

obsidianforensics

unfurl

affected
0 - < 2026.04

Weaknesses (CWE)

CWE-770
CWE-409

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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