{"id":"JLSEC-2026-730","summary":"`wolfSSL_X509_verify_cert` in the OpenSSL compatibility layer accepts a certificate chain in which...","details":"`wolfSSL_X509_verify_cert` in the OpenSSL compatibility layer accepts a certificate chain in which the leaf's signature is not checked, if the attacker supplies an untrusted intermediate with Basic Constraints `CA:FALSE` that is legitimately signed by a trusted root. An attacker who obtains any leaf certificate from a trusted CA (e.g. a free DV cert from Let's Encrypt) can forge a certificate for any subject name with any public key and arbitrary signature bytes, and the function returns `WOLFSSL_SUCCESS` / `X509_V_OK`. The native wolfSSL TLS handshake path (`ProcessPeerCerts`) is not susceptible and the issue is limited to applications using the OpenSSL compatibility API directly, which would include integrations of wolfSSL into nginx and haproxy.","modified":"2026-07-25T18:24:00.949675644Z","published":"2026-07-14T21:41:35.775Z","upstream":["CVE-2026-5501","GHSA-hg75-4cmp-f367","EUVD-2026-21294"],"database_specific":{"license":"CC-BY-4.0","sources":[{"id":"CVE-2026-5501","imported":"2026-07-17T22:32:22.028Z","modified":"2026-06-17T10:59:07.810Z","published":"2026-04-10T04:17:17.230Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-5501","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5501","database_specific":{"status":"Analyzed"}},{"id":"GHSA-hg75-4cmp-f367","imported":"2026-07-17T22:32:22.190Z","modified":"2026-04-27T18:32:02Z","published":"2026-04-10T06:31:38Z","url":"https://api.github.com/advisories/GHSA-hg75-4cmp-f367","html_url":"https://github.com/advisories/GHSA-hg75-4cmp-f367"},{"id":"EUVD-2026-21294","imported":"2026-07-17T22:32:31.992Z","modified":"2026-04-22T13:59:28Z","published":"2026-04-10T03:07:39Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-21294","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-21294"}]},"references":[{"type":"WEB","url":"https://github.com/advisories/GHSA-hg75-4cmp-f367"},{"type":"WEB","url":"https://github.com/wolfSSL/wolfssl/pull/10102"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5501"}],"affected":[{"package":{"name":"wolfSSL_jll","ecosystem":"Julia","purl":"pkg:julia/wolfSSL_jll?uuid=98c43586-9870-5ae5-ab22-acc77b9bbdb5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.9.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-730.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}