curl: GnuTLS + Apple SecTrust discards authenticated OCSP failure

Summary curl 8.23.0 and current master can accept a TLS certificate despite an explicit CURLOPTSSLVERIFYSTATUS=1 / --cert-status requirement when curl uses the GnuTLS backend together with Apple SecTrust. GnuTLS correctly marks an invalid or revoked stapled OCSP response as invalid. Because a...

curl: OpenSSL+Apple SecTrust: SecTrust accepts certificates that the app's CURLOPT_SSL_CTX_FUNCTION trust store or verify callback rejected

Summary: On OpenSSL builds with Apple SecTrust USEAPPLESECTRUST, for example Homebrew's curl, libcurl runs the handshake with SSLVERIFYNONE, calls the application's CURLOPTSSLCTXFUNCTION before it, and, if OpenSSL's verification fails, asks Apple SecTrust and accepts the server when SecTrust trus...

curl: CVE-2026-111953: GnuTLS SecTrust OCSP staple bypass

Summary: When curl is built with GnuTLS and Apple SecTrust, as MacPorts does for curl +gnutls +sectrust, a failed GnuTLS verification is handed to SecTrust, and if SecTrust accepts the chain the GnuTLS result is dropped lib/vtls/gtls.c:1511-1521 in 8.23.0. SecTrust is called without the stapled...

curl: Apple SecTrust fallback ignores CURLOPT_CRLFILE, letting a revoked cert pass

When libcurl is built with USEAPPLESECTRUST and the native Apple trust store is in use, a certificate that OpenSSL/GnuTLS rejects because it is on the operator's CURLOPTCRLFILE list is re-checked by Apple's SecTrust API instead, and SecTrust is never told about that CRL file at all. The bug...

curl: CURLOPT_PROXY_CAINFO_BLOB silently activates native CA store on Apple builds

Hi all, CURLOPTPROXYCAINFOBLOB introduced 7.77.0 never sets proxyssl.customcablob. On USEAPPLESECTRUST / CURLCANATIVE builds this causes curl to silently fall back to the system keychain for proxy TLS verification, nullifying the caller's blob-only trust policy. --- Root cause lib/setopt.c handle...

CVE-2026-7009

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine...

CVE-2026-7009 OCSP stapling bypass with Apple SecTrust

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine...

CVE-2026-7009 OCSP stapling bypass with Apple SecTrust

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine...

CVE-2026-7009

CVE-2026-7009 affects curl when using OCSP stapling. Providers report that curl, on Apple systems with Apple SecTrust and when built with an OpenSSL backend, fails to detect OCSP problems and treats the stapled response as valid. The Nessus entry notes a specific vulnerable range: curl 8.17.0 bef...

curl: CVE-2026-7009: OCSP stapling bypass with Apple SecTrust

Summary When curl is built with --with-apple-sectrust or -DUSEAPPLESECTRUST=ON and OpenSSL, the --cert-status / CURLOPTSSLVERIFYSTATUS option is silently bypassed when Apple SecTrust handles certificate chain verification instead of OpenSSL. The user explicitly requests OCSP stapling enforcement,...