{"answers":{"affected":"3 open source packages ship an affected version, including dfir-unfurl. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40036 exists.","fix":"Upgrade dfir-unfurl to 20260405 or later.","what":"CVE-2026-40036 is a high-severity denial of service vulnerability in obsidianforensics unfurl, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40036 and fix it if it is affected.\n\nWhat it is: CVE-2026-40036 is a high-severity denial of service vulnerability in obsidianforensics unfurl, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40036 exists.\n\nAffected packages and fixed versions:\n- dfir-unfurl (PyPI): affected all versions; fixed in 20260405\n- dfir-unfurl (PyPI): affected all versions; fixed in 20260405\n- dfir-unfurl (PyPI): affected all versions; fixed in 20260405\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-40036/ (Markdown: https://insights.sbomify.com/CVE-2026-40036/index.md)","id":"CVE-2026-40036","markdown":"https://insights.sbomify.com/CVE-2026-40036/index.md","name":"CVE-2026-40036","record":{"aliases":["GHSA-h5qv-qjv4-pc5m","PYSEC-2026-1294"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python URL parsing library","requires_auth":"none","summary":"Remote attackers can cause denial of service by submitting highly compressed payloads that exhaust server memory in the Unfurl library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"unfurl","vendor":"ryandfir"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-409","name":"Improper Handling of Highly Compressed Data (Data Amplification)"}],"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Unfurl \u003c 2026.04 - Denial of Service via Unbounded zlib Decompression","id":"CVE-2026-40036","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"OpenClaw \u003c 2026.4.8 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects","id":"CVE-2026-40037"},"packages":[{"ecosystem":"PyPI","fixed":["20260405"],"introduced":["0"],"last_affected":[],"package":"dfir-unfurl","purl":null,"source":"GHSA-h5qv-qjv4-pc5m"},{"ecosystem":"PyPI","fixed":["20260405"],"introduced":["0"],"last_affected":[],"package":"dfir-unfurl","purl":"pkg:pypi/dfir-unfurl","source":"GHSA-h5qv-qjv4-pc5m"},{"ecosystem":"PyPI","fixed":["20260405"],"introduced":["0"],"last_affected":[],"package":"dfir-unfurl","purl":"pkg:pypi/dfir-unfurl","source":"PYSEC-2026-1294"}],"prev":{"headline":"Unfurl - Werkzeug Debugger Exposure via String Config Parsing","id":"CVE-2026-40035"},"products":["unfurl"],"published":"2026-04-08","related":[{"cvss_score":9.3,"headline":"Unfurl - Werkzeug Debugger Exposure via String Config Parsing","id":"CVE-2026-40035","kev_date_added":null,"published":"2026-04-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["obsidianforensics"]},"summary":"Remote attackers can cause denial of service by submitting highly compressed payloads that exhaust server memory in the Unfurl library.","url":"https://insights.sbomify.com/CVE-2026-40036/"}