{"answers":{"affected":"3 open source packages ship an affected version, including github.com/casdoor/casdoor.","exploited":"There is no known exploitation of CVE-2026-9090 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-9090 is a critical authentication bypass vulnerability in Casdoor, published on 28 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-2026-9090 and fix it if it is affected.\n\nWhat it is: CVE-2026-9090 is a critical authentication bypass vulnerability in Casdoor, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-9090 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/casdoor/casdoor (Go): affected all versions; no fix listed\n- github.com/casdoor/casdoor (Go): affected all versions up to 1.1000.1-0.20260321120606-239e8bd69487; no fix listed\n- github.com/casdoor/casdoor (Go): affected all versions up to 1.1000.1-0.20260321120606-239e8bd69487; 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-2026-9090/ (Markdown: https://insights.sbomify.com/CVE-2026-9090/index.md)","id":"CVE-2026-9090","markdown":"https://insights.sbomify.com/CVE-2026-9090/index.md","name":"CVE-2026-9090","record":{"aliases":["GHSA-fwgq-j9r9-qjgr","GO-2026-5895"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Casdoor identity provider","requires_auth":"none","summary":"Attackers can bypass SAML authentication in Casdoor by forging assertions with arbitrary certificates, leading to unauthorized access.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[],"description":"Casdoor versions 2.362.0 and earlier contain a vulnerability that allows an attacker to bypass authentication by supplying an arbitrary signing certificate. The buildSpCertificateStore function extracts the X.509 certificate directly from the incoming SAMLResponse instead of using the trusted pre-configured Identity Provider certificate, allowing an attacker to forge assertions signed with an attacker-controlled key.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2026-08-03","github_poc":2,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-03T01:59:57Z","kind":"github_poc","ref":"https://github.com/George0Papasotiriou/CVE-2026-9090-Modbus-TCP-Write-to-Read-Only-Coils-via-Function-Code-Spoofing","stars":0,"title":null},{"date":"2026-08-15T16:41:51Z","kind":"github_poc","ref":"https://github.com/Kimdir01/CVE-2026-9090-poc","stars":0,"title":"PoC for CVE-2026-9090 — Casdoor SAML signature bypass (CWE-347). Reproduction-only; coordinated via CERT/CC VU#780781."}],"tier":"poc_unverified"},"has_fix":true,"headline":"CVE-2026-9090","id":"CVE-2026-9090","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"CVE-2026-9091","id":"CVE-2026-9091"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/casdoor/casdoor","purl":"pkg:golang/github.com/casdoor/casdoor","source":"GO-2026-5895"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1000.1-0.20260321120606-239e8bd69487"],"package":"github.com/casdoor/casdoor","purl":null,"source":"GHSA-fwgq-j9r9-qjgr"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1000.1-0.20260321120606-239e8bd69487"],"package":"github.com/casdoor/casdoor","purl":"pkg:golang/github.com/casdoor/casdoor","source":"GHSA-fwgq-j9r9-qjgr"}],"prev":{"headline":"Supply chain in Automate","id":"CVE-2026-9089"},"products":["Casdoor"],"published":"2026-05-28","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":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-05-29","vendors":["Casdoor"]},"summary":"Attackers can bypass SAML authentication in Casdoor by forging assertions with arbitrary certificates, leading to unauthorized access.","url":"https://insights.sbomify.com/CVE-2026-9090/"}