{"answers":{"affected":"2 open source packages ship an affected version, including better-auth.","exploited":"There is no known exploitation of CVE-2026-67337 in the wild and no public exploit code.","fix":"Upgrade better-auth to 1.4.9 or later.","what":"CVE-2026-67337 is a high-severity authentication bypass vulnerability in better-auth, published on 1 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-67337 and fix it if it is affected.\n\nWhat it is: CVE-2026-67337 is a high-severity authentication bypass vulnerability in better-auth, published on 1 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-67337 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- better-auth (npm): affected all versions; fixed in 1.4.9\n- better-auth (npm): affected all versions; fixed in 1.4.9\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-2026-67337/ (Markdown: https://insights.sbomify.com/CVE-2026-67337/index.md)","id":"CVE-2026-67337","markdown":"https://insights.sbomify.com/CVE-2026-67337/index.md","name":"CVE-2026-67337","record":{"aliases":["GHSA-8pwm-pjg9-4h92","GHSA-xg6x-h9c9-2m83"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Authentication library","requires_auth":"low_privilege","summary":"Attackers with valid credentials can bypass two-factor authentication in better-auth when session caching is enabled, accessing protected routes without second-factor verification.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-288","name":"Authentication Bypass Using an Alternate Path or Channel"}],"description":"better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.","ecosystems":["npm"],"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":"better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache","id":"CVE-2026-67337","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"JupyterLab before 4.5.9 Stored XSS via Extension Manager","id":"CVE-2026-67338"},"packages":[{"ecosystem":"npm","fixed":["1.4.9"],"introduced":["0"],"last_affected":[],"package":"better-auth","purl":null,"source":"GHSA-xg6x-h9c9-2m83"},{"ecosystem":"npm","fixed":["1.4.9"],"introduced":["0"],"last_affected":[],"package":"better-auth","purl":"pkg:npm/better-auth","source":"GHSA-xg6x-h9c9-2m83"}],"prev":{"headline":"better-auth before 1.6.11 Insecure Cryptographic Defaults via oidcProvider","id":"CVE-2026-67336"},"products":["better-auth"],"published":"2026-08-01","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":"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":"2026-08-03","vendors":["better-auth"]},"summary":"Attackers with valid credentials can bypass two-factor authentication in better-auth when session caching is enabled, accessing protected routes without second-factor verification.","url":"https://insights.sbomify.com/CVE-2026-67337/"}