{"answers":{"affected":"2 open source packages ship an affected version, including @better-auth/sso. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-53515 in the wild and no public exploit code.","fix":"Upgrade @better-auth/sso to 1.6.11 or later.","what":"CVE-2026-53515 is a high-severity vulnerability in @better-auth better-auth, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53515 and fix it if it is affected.\n\nWhat it is: CVE-2026-53515 is a high-severity vulnerability in @better-auth better-auth, published on 15 Jul 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-2026-53515 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @better-auth/sso (npm): affected from 1.2.10; fixed in 1.6.11\n- @better-auth/sso (npm): affected from 1.2.10; fixed in 1.6.11\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-2026-53515/ (Markdown: https://insights.sbomify.com/CVE-2026-53515/index.md)","id":"CVE-2026-53515","markdown":"https://insights.sbomify.com/CVE-2026-53515/index.md","name":"CVE-2026-53515","record":{"aliases":["GHSA-gv74-j8m3-fg5f"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"TypeScript authentication library","requires_auth":"low_privilege","summary":"Attackers can register malicious SSO providers to escalate privileges and take over accounts due to missing admin role checks in the Better Auth SSO plugin.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"better-auth\\/sso","vendor":"better-auth"},{"product":"better_auth","vendor":"better-auth"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-285","name":"Improper Authorization"},{"id":"CWE-269","name":"Improper Privilege Management"}],"description":"Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row and does not require an owner or admin role, allowing attacker-controlled OIDC or SAML providers to drive /sso/callback/{providerId} organization provisioning. This issue is fixed in version 1.6.11.","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":true,"headline":"Better Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/sso","id":"CVE-2026-53515","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"privilege_escalation","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Better Auth: Account takeover via OAuth auto-link to unverified pre-registered email","id":"CVE-2026-53516"},"packages":[{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["1.2.10"],"last_affected":[],"package":"@better-auth/sso","purl":null,"source":"GHSA-gv74-j8m3-fg5f"},{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["1.2.10"],"last_affected":[],"package":"@better-auth/sso","purl":"pkg:npm/%40better-auth/sso","source":"GHSA-gv74-j8m3-fg5f"}],"prev":{"headline":"Better Auth: Unauthorized invitation acceptance via unverified email match in organization plugin","id":"CVE-2026-53514"},"products":["better-auth","sso"],"published":"2026-07-15","related":[{"cvss_score":9.6,"headline":"Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration","id":"CVE-2026-53513","kev_date_added":null,"published":"2026-07-15"}],"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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["@better-auth","better-auth"]},"summary":"Attackers can register malicious SSO providers to escalate privileges and take over accounts due to missing admin role checks in the Better Auth SSO plugin.","url":"https://insights.sbomify.com/CVE-2026-53515/"}