3498 matches found
OESA-2026-3678 curl security update
cURL is a computer software project providing a library libcurl and command-line tool curl for transferring data using various protocols. Security Fixes: 'Hello friends,', 'CVE-2026-8286: wrong STARTTLS connection reuse LOW', 'CVE-2026-8458: wrong reuse for different services LOW', 'CVE-2026-8924...
K000163213: libcurl vulnerability CVE-2026-8932
Security Advisory Description libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches t...
curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections
A flaw was found in libcurl. When libcurl handles HTTP/2 Server Push streams and the parent handle shares connections, a use-after-free vulnerability can occur during the cleanup process. This could lead to application crashes, resulting in a denial of service...
curl: libcurl: Information disclosure via incorrect connection reuse with Negotiate authentication
A flaw was found in libcurl. This vulnerability allows an attacker to reuse an HTTP connection set up for a given hostname using Negotiate authentication. When an initial request is made with empty credentials, a subsequent user's request can be sent over a previously authenticated connection...
curl: curl: Authentication bypass in OpenLDAP SASL negotiation via Man-in-the-Middle (MITM) attack
A flaw was found in libcurl's SASL Simple Authentication and Security Layer negotiation for LDAP Lightweight Directory Access Protocol authentication when using the OpenLDAP backend. An incomplete handshake sequence can be misinterpreted as a successful cryptographic verification. A remote...
curl: libcurl: Information disclosure via improper Public Suffix List boundary check
A flaw was found in libcurl when libpsl support is enabled. A remote attacker could exploit this vulnerability by setting a Set-Cookie header with a Domain attribute that explicitly matches a public suffix. This improper handling causes libcurl to save the cookie with a wildcard domain scope,...
curl: libcurl: Information disclosure via incorrect connection reuse with Negotiate authentication
A flaw was found in libcurl. This vulnerability allows an attacker to reuse an HTTP connection set up for a given hostname using Negotiate authentication. When an initial request is made with empty credentials, a subsequent user's request can be sent over a previously authenticated connection...
curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections
A flaw was found in libcurl. When libcurl handles HTTP/2 Server Push streams and the parent handle shares connections, a use-after-free vulnerability can occur during the cleanup process. This could lead to application crashes, resulting in a denial of service...
curl: curl: Public key pinning bypass allows unauthenticated connections
A flaw was found in libcurl, a client-side URL transfer library. When public key pinning is configured, but standard peer verification is explicitly disabled, libcurl incorrectly allows connections to proceed without enforcing the public key pinning. This bypass enables unauthenticated connection...
curl: curl: Incorrect HTTPS connection reuse with Native CA Store
A flaw was found in libcurl. This vulnerability allows libcurl to incorrectly reuse an existing HTTPS connection for a given hostname, even when a different Native CA Store setting CURLSSLOPTNATIVECA is specified for the new connection. This could potentially lead to a client trusting a malicious...
libcurl 7.64.1 < 8.22.0 Negotiate Ambient User Connection Reuse
The version of libcurl installed on the remote host is 7.64.1 prior to 8.22.0. It is, therefore, affected by an information disclosure vulnerability: - A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request i...
libcurl 7.44.0 < 8.22.0 HTTP/2 Server Push Use-After-Free
The version of libcurl installed on the remote host is 7.44.0 prior to 8.22.0. It is, therefore, affected by a use-after-free vulnerability: - A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to...
Curl 7.64.1 < 8.22.0 Negotiate Ambient User Connection Reuse
The version of curl installed on the remote host is 7.64.1 prior to 8.22.0. It is, therefore, affected by an information disclosure vulnerability: - A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is...
CURL-CVE-2026-82208 wolfSSL CA-cache hit overrides callback
With the wolfSSL backend, when CA caching is enabled and an CURLOPTSSLCTXFUNCTION callback replaces the trust store, libcurl can silently reinstall the cached store after the callback returns. A certificate trusted by the cached store but rejected by the callback-selected store is then incorrectl...
CURL-CVE-2026-19931 Negotiate ambient user conn reuse
A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...
OpenSSL pinning bypass
When CURLOPTPINNEDPUBLICKEY is configured alongside options that disable standard peer verification CURLOPTSSLVERIFYPEER = 0 and CURLOPTSSLVERIFYHOST = 0, libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check und...
HTTP/2 server push UAF
A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process...
Negotiate ambient user conn reuse
A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection...
CURL-CVE-2026-80230 OpenSSL pinning bypass
When CURLOPTPINNEDPUBLICKEY is configured alongside options that disable standard peer verification CURLOPTSSLVERIFYPEER = 0 and CURLOPTSSLVERIFYHOST = 0, libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check und...
CURL-CVE-2026-80229 OpenSSL provider use-after-free
When performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership...