CVE-2026-70367 | BDVDB-2026-355221 Detail

Description#

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", "::"), enabling access to loopback-only services on the "stunnel" host that should not be network-reachable.

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Exploit#

History#

1. Version 12026-08-04Record published in the CVE List.
2. Version 22026-11-05Most recent update recorded in the CVE List.