{"answers":{"affected":"3 open source packages ship an affected version, including granian.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42544 exists.","fix":"Upgrade granian to 2.7.4 or later.","what":"CVE-2026-42544 is a high-severity denial of service vulnerability in emmett-framework granian, published on 12 May 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-2026-42544 and fix it if it is affected.\n\nWhat it is: CVE-2026-42544 is a high-severity denial of service vulnerability in emmett-framework granian, published on 12 May 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-2026-42544 exists.\n\nAffected packages and fixed versions:\n- granian (PyPI): affected from 1.2.0; fixed in 2.7.4\n- granian (PyPI): affected from 1.2.0; fixed in 2.7.4\n- granian (PyPI): affected from 1.2.0; fixed in 2.7.4\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-2026-42544/ (Markdown: https://insights.sbomify.com/CVE-2026-42544/index.md)","id":"CVE-2026-42544","markdown":"https://insights.sbomify.com/CVE-2026-42544/index.md","name":"CVE-2026-42544","record":{"aliases":["ECHO-14ce-5047-a43f","GHSA-vrg7-482j-p6f6","MINI-rmqh-xwrw-h2ff","PYSEC-2026-2503"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python HTTP server","requires_auth":"none","summary":"Unauthenticated attackers can crash Granian worker processes by sending WebSocket requests with non-ASCII subprotocol headers, causing service disruption.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-248","name":"Uncaught Exception"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Granian is a Rust HTTP server for Python applications. From 1.2.0 to 2.7.4, Granian aborts a worker process when an unauthenticated client sends a WebSocket upgrade request whose Sec-WebSocket-Protocol header contains non-ASCII bytes. The crash happens in Granian's WebSocket scope construction path, before the ASGI application is invoked. This vulnerability is fixed in 2.7.4.","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":"Granian: Unauthenticated DoS via WebSocket subprotocol header panic","id":"CVE-2026-42544","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Granian: DoS via WSGI response header panic","id":"CVE-2026-42545"},"packages":[{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["1.2.0"],"last_affected":[],"package":"granian","purl":null,"source":"GHSA-vrg7-482j-p6f6"},{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["1.2.0"],"last_affected":[],"package":"granian","purl":"pkg:pypi/granian","source":"GHSA-vrg7-482j-p6f6"},{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["1.2.0"],"last_affected":[],"package":"granian","purl":"pkg:pypi/granian","source":"PYSEC-2026-2503"}],"prev":{"headline":"IRIS has a Cross-Site Request Forgery (CSRF) issue","id":"CVE-2026-42543"},"products":["granian"],"published":"2026-05-12","related":[],"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":"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":"2026-05-18","vendors":["emmett-framework"]},"summary":"Unauthenticated attackers can crash Granian worker processes by sending WebSocket requests with non-ASCII subprotocol headers, causing service disruption.","url":"https://insights.sbomify.com/CVE-2026-42544/"}