VDB

CVE-2026-70367

CVE-2026-70367 PUBLISHED CVSS 5.4 MEDIUM

Reported by redhat · Published August 4, 2026

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.

Risk Scores

CVSS 3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected Products

VendorProductVersions
Mobi-Com Polska Sp. z o.o.stunnel5.25
Red HatRed Hat Enterprise Linux 10
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Enterprise Linux 7
Red HatRed Hat Enterprise Linux 8
Red HatRed Hat Enterprise Linux 9
Red HatRed Hat Enterprise Linux 10
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Enterprise Linux 7
Red HatRed Hat Enterprise Linux 9
Mobi-Com Polska Sp. z o.o.stunnel5.25
Red HatRed Hat Enterprise Linux 8

Timeline

  • Aug 4, 2026 Coalition ESS Score
  • Aug 4, 2026 CVE Published
  • Aug 5, 2026 Security Advisory
  • Aug 7, 2026 EPSS Score

References

  • vdb-entryx_refsource_REDHAT
  • RHBZ#2462083 issue-trackingx_refsource_REDHAT
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