{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-123800 in the wild and no public exploit code.","exposure":"","fix":"No fix has been published for CVE-2026-123800 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-123800 is a critical vulnerability in supertokens-core, published on 9 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123800 and fix it if it is affected.\n\nWhat it is: CVE-2026-123800 is a critical vulnerability in supertokens-core, published on 9 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123800 in the wild and no public exploit code.\n\nAffected product: supertokens-core. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-123800/ (Markdown: https://insights.sbomify.com/CVE-2026-123800/index.md)","id":"CVE-2026-123800","markdown":"https://insights.sbomify.com/CVE-2026-123800/index.md","name":"CVE-2026-123800","record":{"aliases":["GHSA-4rf2-xqvf-8rcx"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":9.9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"SuperTokens Core is an open source authentication server. From 6.0.0 until 6.0.24, 7.0.23, 8.0.7, 9.0.6, 9.1.6, 9.2.7, 9.3.5, 10.0.8, 10.1.9, 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, Multitenancy.checkPermissionsForCreateOrUpdate in src/main/java/io/supertokens/multitenancy/Multitenancy.java does not adequately authorize updates to a parent connection URI domain or the base tenant. In a licensed multi-tenant deployment with multiple applications under one non-default connection URI domain and separate api_keys, an attacker holding one application's valid API key can update the parent domain because the CUD-target branch checks the domain without requiring the source application and tenant to be public. Because api_keys is not protected, the attacker can replace the parent key and then sibling application keys, read or modify sibling users, obtain sessions as those users, establish persistence through a sibling dashboard user, and lock out the sibling application's own key. In the advisory's v2 create or update handlers, omitting the optional identifier produces a base-tenant target that skips the permission branches and enterprise-feature gate, allowing changes to firstFactors, required secondary factors, and recipe-enabled flags that affect login integrity and availability. The base-target variant still rejects coreConfig and does not establish key theft. This issue is fixed in versions 6.0.24, 7.0.23, 8.0.7, 9.0.6, 9.1.6, 9.2.7, 9.3.5, 10.0.8, 10.1.9, 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1.","ecosystems":[],"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":"SuperTokens Core is an open source authentication server.","id":"CVE-2026-123800","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":37,"next":{"headline":"SuperTokens Core is an open source authentication server.","id":"CVE-2026-123801"},"nickname":null,"packages":[],"prev":{"headline":"SuperTokens Core is an open source authentication server.","id":"CVE-2026-123799"},"products":["supertokens-core"],"published":"2026-11-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-09","vendors":["supertokens"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123800/"}