CVE-2026-40036
- Source
- https://cve.org/CVERecord?id=CVE-2026-40036
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40036.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-40036
- Aliases
- Published
- 2026-04-08T21:35:28.460Z
- Modified
- 2026-07-08T08:13:14.357919065Z
- Severity
-
- 8.7 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- Unfurl < 2026.04 - Denial of Service via Unbounded zlib Decompression
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40036.json", "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-409", "CWE-770" ] }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40036.json
- https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m
- https://nvd.nist.gov/vuln/detail/CVE-2026-40036
- https://www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression
- https://github.com/obsidianforensics/unfurl/releases/tag/v2026.04
- https://github.com/obsidianforensics/unfurl
Affected packages
Git / github.com/RyanDFIR/unfurl
Affected ranges
- Type
- GIT
- Repo
- https://github.com/RyanDFIR/unfurl
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "source": [ "AFFECTED_FIELD", "CPE_RANGE", "REFERENCES" ], "cpe": "cpe:2.3:a:ryandfir:unfurl:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "2026.04" } ] }