Server-Side Request Forgery (SSRF) Affecting stunnel-doc package, versions <5.74-160000.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.16% (5th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES1600-STUNNELDOC-21350410
  • published21 Oct 2026
  • disclosed12 Oct 2026

Introduced: 12 Oct 2026

NewCVE-2026-70367  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 stunnel-doc to version 5.74-160000.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream stunnel-doc package and not the stunnel-doc package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1