CVEvulnerability

CVE-2026-70367

5.4 MEDIUM Published 2026-08-04 Modified 2026-08-06 Official page ↗
Status
Awaiting Analysis
Published
2026-08-04
Last modified
2026-08-06
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-918

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.

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References