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
| Vendor | Product | Versions |
|---|---|---|
| Mobi-Com Polska Sp. z o.o. | stunnel | 5.25 |
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Mobi-Com Polska Sp. z o.o. | stunnel | 5.25 |
| Red Hat | Red 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