{
"id": "GHSA-c3f2-qg8v-25q2",
"aliases": [],
"details": "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-h5qv-qjv4-pc5m. This link is maintained to preserve external references.\n\n### Original Description\nUnfurl 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.",
"summary": "Duplicate Advisory: Unfurl's unbounded zlib decompression allows decompression bomb DoS",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.04"
}
]
}
],
"package": {
"name": "dfir-unfurl",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-04-10T17:18:31Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"published": "2026-04-09T00:31:59Z",
"withdrawn": "2026-04-10T17:18:31Z",
"references": [
{
"url": "https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40036",
"type": "ADVISORY"
},
{
"url": "https://github.com/RyanDFIR/unfurl/pull/243",
"type": "WEB"
},
{
"url": "https://github.com/RyanDFIR/unfurl",
"type": "PACKAGE"
},
{
"url": "https://github.com/RyanDFIR/unfurl/releases/tag/v2026.04",
"type": "WEB"
},
{
"url": "https://www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-409"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-04-08T22:16:24Z",
"github_reviewed_at": "2026-04-10T17:18:31Z"
}
}