GHSA-c3f2-qg8v-25q2
High · 7.5Duplicate Advisory: Unfurl's unbounded zlib decompression allows decompression bomb DoS
CVSS
7.5
EPSS
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Published
Apr 9, 2026
CISA due date
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The record
### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-h5qv-qjv4-pc5m.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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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