CVE-2026-70368

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70367

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70368 Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70368

CVE-2026-70368 involves a stack-based out-of-bounds read in stunnel’s s_vlog when processing oversized log messages via vsnprintf. A remote attacker can send protocol inputs to a stunnel service that produce a log entry longer than 1024 bytes, triggering the out-of-bounds read and potentially cau...

EUVD-2026-52688

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70368 Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70368

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70368 Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

CVE-2026-70368

A stack-based out-of-bounds read vulnerability exists in the "svlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an...

EUVD-2026-52687

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70367

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70367 Stunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified addresses allows access to loopback-only services

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70367 Stunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified addresses allows access to loopback-only services

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70367 Stunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified addresses allows access to loopback-only services

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

CVE-2026-70367

CVE-2026-70367 affects stunnel

CVE-2026-70367

A Server-Side Request Forgery SSRF bypass vulnerability exists in “stunnel” 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypass intended localhost restrictions by using IPv4-mapped IPv6 addresses e.g., “::ffff:127.0.0.1” or unspecified addresses "0.0.0.0", "::"...

Linux Distros Unpatched Vulnerability : CVE-2026-70368

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A stack-based out-of-bounds read vulnerability exists in the svlog function of stunnel, when handling oversized log messages via vsnprintf. A remote attacker wi...

Linux Distros Unpatched Vulnerability : CVE-2026-70367

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A Server-Side Request Forgery SSRF bypass vulnerability exists in stunnel 5.79 and lower when configured in SOCKS proxy mode. This flaw allows a client to bypas...

MiracleLinux 8 : stunnel-5.56-5.el8 (AXSA:2021-1521:02)

The remote MiracleLinux 8 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2021-1521:02 advisory. stunnel: client certificate not correctly verified when redirect and verifyChain options are used CVE-2021-20230 Tenable has extracted the preceding...

MiracleLinux 4 : stunnel-4.29-3.AXS4 (AXSA:2013-374:01)

The remote MiracleLinux 4 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2013-374:01 advisory. Stunnel is a socket wrapper which can provide SSL Secure Sockets Layer support to ordinary applications. For example, it can be used in conjunction with imapd...