Red HatCVE-2026-70367
Red Hat Enterprise Linux 10: server-side request forgery
Medium5.4CVE-2026-70367 · Published Aug 4, 2026 · updated Aug 6, 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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| stunnel Product | >= 5.25, < 5.80 | 5.80 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-918
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 4 | Red Hat SSSD: out-of-bounds read | Medium5.5 | No fix yet |
| Aug 4 | Red Hat Enterprise Linux 10: out-of-bounds read | Medium6.5 | 5.80 |
| Aug 4 | Red Hat Build of Keycloak: improper signature check | Low3.7 | No fix yet |
| Aug 4 | Red Hat popt: code execution | Low2.5 | No fix yet |
| Aug 4 | Red Hat SSSD: uninitialized resource | Low3.3 | No fix yet |
| Aug 4 | Red Hat Enterprise Linux: heap buffer overflow | High7.3 | No fix yet |