CVE-2026-45185

Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS closenotify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to...

CVE-2026-42225 GnuTLS backend silently skips certificate chain verification when verify_peer is false

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport siptransporttls can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via...

CVE-2026-42225 GnuTLS backend silently skips certificate chain verification when verify_peer is false

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport siptransporttls can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via...

CVE-2026-42225 GnuTLS backend silently skips certificate chain verification when verify_peer is false

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport siptransporttls can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via...

curl: curl built with GnuTLS backend defaults to weak crypto parameters

Summary: Curl configured with GnuTLS backend --with-gnutls defaults using "NORMAL" as the base level of the library cryptographic security. From GnuTLS documentation: The message authenticity security level is of 64 bits or more, and the certificate verification profile is set to GNUTLSPROFILELOW...

SUSE CVE-2013-6422

The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification CURLOPTSSLVERIFYPEER, also disables the CURLOPTSSLVERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle MITM...

SUSE CVE-2018-21029

systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication SNI is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname...

systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)

...

CVE-2018-21029

systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication SNI is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname...

EulerOS Virtualization 2.5.3 : curl (EulerOS-SA-2019-1172)

According to the versions of the curl packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification...

CVE-2013-6422

The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification CURLOPTSSLVERIFYPEER, also disables the CURLOPTSSLVERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle MITM...