CVE-2026-40036 — Unfurl < 2026.04 - Denial of Service via Unbounded zlib Decompression
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…
Published: 2026-04-08 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7