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CVE

GHSA-c3f2-qg8v-25q2

Duplicate Advisory: Unfurl's unbounded zlib decompression allows decompression bomb DoS
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CVE

GHSA-c3f2-qg8v-25q2

Duplicate Advisory: Unfurl's unbounded zlib decompression allows decompression bomb DoS

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-h5qv-qjv4-pc5m. This link is maintained to preserve external references.

Original 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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
-
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m, https://nvd.nist.gov/vuln/detail/CVE-2026-40036, https://github.com/RyanDFIR/unfurl/pull/243, https://github.com/RyanDFIR/unfurl, https://github.com/RyanDFIR/unfurl/releases/tag/v2026.04, https://www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
0
Fix Available
2026.04

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