GHSA-c3f2-qg8v-25q2: Duplicate Advisory: Unfurl's unbounded zlib decompression allows decompression bomb DoS
(updated )
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This advisory has been withdrawn because it is a duplicate of GHSA-h5qv-qjv4-pc5m.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.
References
- github.com/RyanDFIR/unfurl
- github.com/RyanDFIR/unfurl/pull/243
- github.com/RyanDFIR/unfurl/releases/tag/v2026.04
- github.com/advisories/GHSA-c3f2-qg8v-25q2
- github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m
- nvd.nist.gov/vuln/detail/CVE-2026-40036
- www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression
Code Behaviors & Features
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