{"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-2026-42545 exists.","fix":"Upgrade granian to 2.7.4 or later.","what":"CVE-2026-42545 is a medium-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-2026-42545 and fix it if it is affected.\n\nWhat it is: CVE-2026-42545 is a medium-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-2026-42545 exists.\n\nAffected packages and fixed versions:\n- granian (PyPI): affected from 0.2.0; fixed in 2.7.4\n- granian (PyPI): affected from 0.2.0; fixed in 2.7.4\n- granian (PyPI): affected from 0.2.0; 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-2026-42545/ (Markdown: https://insights.sbomify.com/CVE-2026-42545/index.md)","id":"CVE-2026-42545","markdown":"https://insights.sbomify.com/CVE-2026-42545/index.md","name":"CVE-2026-42545","record":{"aliases":["ECHO-929c-2ac9-d0a4","GHSA-f5p7-9fr5-8jmj","MINI-w9ph-v866-c555","PYSEC-2026-2502"],"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":"A malicious WSGI application can cause a Denial of Service by returning invalid HTTP headers, triggering a worker process abort in Granian.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"},{"id":"CWE-248","name":"Uncaught Exception"}],"description":"Granian is a Rust HTTP server for Python applications. From 0.2.0 to 2.7.4, Granian aborts a worker process if a WSGI application returns an invalid HTTP response header name or value. The WSGI response conversion path uses .unwrap() on both the header name and header value constructors, so malformed output from the application becomes a process abort instead of a handled error. 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: DoS via WSGI response header panic","id":"CVE-2026-42545","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":"OP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_refs() leaks mobj references","id":"CVE-2026-42546"},"packages":[{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["0.2.0"],"last_affected":[],"package":"granian","purl":null,"source":"GHSA-f5p7-9fr5-8jmj"},{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["0.2.0"],"last_affected":[],"package":"granian","purl":"pkg:pypi/granian","source":"GHSA-f5p7-9fr5-8jmj"},{"ecosystem":"PyPI","fixed":["2.7.4"],"introduced":["0.2.0"],"last_affected":[],"package":"granian","purl":"pkg:pypi/granian","source":"PYSEC-2026-2502"}],"prev":{"headline":"Granian: Unauthenticated DoS via WebSocket subprotocol header panic","id":"CVE-2026-42544"},"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-14","vendors":["emmett-framework"]},"summary":"A malicious WSGI application can cause a Denial of Service by returning invalid HTTP headers, triggering a worker process abort in Granian.","url":"https://insights.sbomify.com/CVE-2026-42545/"}