{"answers":{"affected":"3 open source packages ship an affected version, including sanic-cors.","exploited":"There is no known exploitation of CVE-2026-37737 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-37737 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-37737 is a medium-severity vulnerability in n/a, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-37737 and fix it if it is affected.\n\nWhat it is: CVE-2026-37737 is a medium-severity vulnerability in n/a, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-37737 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- sanic-cors (PyPI): affected all versions up to 2.2.0; no fix listed\n- sanic-cors (PyPI): affected all versions up to 2.2.0; no fix listed\n- sanic-cors (PyPI): affected all versions up to 2.2.0; no fix listed\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-2026-37737/ (Markdown: https://insights.sbomify.com/CVE-2026-37737/index.md)","id":"CVE-2026-37737","markdown":"https://insights.sbomify.com/CVE-2026-37737/index.md","name":"CVE-2026-37737","record":{"aliases":["GHSA-94jw-hqvj-vw74","PYSEC-2026-3539"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python CORS library","requires_auth":"none","summary":"Attackers can bypass CORS origin allowlists via improper regex matching, gaining unauthorized access to authenticated cross-origin resources.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-625","name":"Permissive Regular Expression"},{"id":"CWE-346","name":"Origin Validation Error"}],"description":"sanic-cors version 2.2.0 and prior contains an improper regular expression in the try_match() function in sanic_cors/core.py that uses re.match without end-anchoring. This allows an attacker to bypass CORS origin allowlists by registering a domain that begins with a trusted origin string, to gain unauthorized access to cross-origin requests for authenticated resources.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"sanic-cors contains an improper regular expression in the try_match() function","id":"CVE-2026-37737","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"File upload in n/a","id":"CVE-2026-37748"},"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["2.2.0"],"package":"sanic-cors","purl":null,"source":"GHSA-94jw-hqvj-vw74"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["2.2.0"],"package":"sanic-cors","purl":"pkg:pypi/sanic-cors","source":"GHSA-94jw-hqvj-vw74"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["2.2.0"],"package":"sanic-cors","purl":"pkg:pypi/sanic-cors","source":"PYSEC-2026-3539"}],"prev":{"headline":"Denial of service in n/a","id":"CVE-2026-37736"},"products":["n/a"],"published":"2026-06-05","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-05","vendors":["n/a"]},"summary":"Attackers can bypass CORS origin allowlists via improper regex matching, gaining unauthorized access to authenticated cross-origin resources.","url":"https://insights.sbomify.com/CVE-2026-37737/"}