CVE-2026-87862

Importing a includeSubDomains parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS...

CVE-2026-87864

Enabling CURLOPTCRLF causes curl to advertise the raw input byte count in the IMAP APPEND N literal while transmitting line-ending expanded data. The server reads only $N$ bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within...

CVE-2026-87863

An authenticated HTTPS origin can supply an HSTS max-age value that the parser accepts, but time serialization later fails to process. On 64-bit systems, extreme max-age values compute an absolute expiry within standard time integer limits that exceeds calendar time structure bounds. During cache...

CVE-2026-87866

When built with wolfSSL, curl can successfully validate a pinned public key hash against a key the TLS peer does not possess. During the TLS handshake, wolfSSL validates the connection, but curl's subsequent re-parsing of the same certificate - tricked by a manipulated validity length field -...

CVE-2026-107929

When CURLOPTINTERFACE or the command line tool's --interface option is set with one of the documented prefixes if!, host!, ifhost!, that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go out from the...

CVE-2026-107928

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when gnutlsrecordsend returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocked...

CVE-2026-107929

When "CURLOPTINTERFACE" or the command line tool's "--interface" option is set with one of the documented prefixes "if!", "host!", "ifhost!", that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go ou...

CVE-2026-107929

When CURLOPTINTERFACE or the command line tool's --interface option is set with one of the documented prefixes if!, host!, ifhost!, that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go out from the...

CVE-2026-107928

The curl software, when compiled with GnuTLS support, is vulnerable to an out-of-bounds read during WebSocket uploads. A malicious WebSocket server can trigger this by causing a blocked transmission, leading to gnutls_record_send() returning a byte count greater than the provided buffer size. Thi...

EUVD-2026-105357

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when gnutlsrecordsend returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocked...

CVE-2026-107928

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when "gnutlsrecordsend" returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocke...

CVE-2026-107928

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when gnutlsrecordsend returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocked...

CVE-2026-107928

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when gnutlsrecordsend returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocked...

EUVD-2026-105353

When processing an HTTP redirect to a URL containing userinfo a username:password component, curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl t...

CVE-2026-94265

The curl library (and libcurl package) is vulnerable to an information exposure flaw when processing HTTP redirects to URLs containing userinfo (a username:password component). The software may erroneously retain and re-transmit the original host's HTTP Negotiate authentication state to an untrus...

CVE-2026-94265

When processing an HTTP redirect to a URL containing userinfo a "username:password" component, curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl...

CVE-2026-94265

When processing an HTTP redirect to a URL containing userinfo a username:password component, curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl t...

CVE-2026-94265 Authorization: Negotiate sent to foreign origin

When processing an HTTP redirect to a URL containing userinfo a username:password component, curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl t...

CVE-2026-94265

When processing an HTTP redirect to a URL containing userinfo a username:password component, curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl t...

CVE-2026-92390

The curl command-line tool fails to maintain its documented anti-clobbering protection when the --remote-header-name (-J) option is used. A malicious HTTP(S) server can bypass this protection by providing an intermediate 103 Early Hints response or by processing an ETag header before a Content-Di...