DEBIAN-CVE-2026-70367

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Source
https://security-tracker.debian.org/tracker/CVE-2026-70367
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70367.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-70367
Upstream
Published
2026-08-04T14:16:32.557Z
Modified
2026-08-08T11:00:10.815165132Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:14 / stunnel

Package

Name
stunnel
Purl
pkg:deb/debian/stunnel?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3:5.80-1

Affected versions

3.*
3.10-0potato1
3.22-1
2:3.*
2:3.26-2
2:3.26-2.1
2:3.26-3
2:3.26-4
2:3.26-5
2:3.26-6
2:3.26-7
2:3.26-8
2:3.26-9
2:3.26-10
2:3.26-11
2:3.26-dfsg-1
2:3.26-dfsg-2
3:5.*
3:5.78-3
3:5.78-4
3:5.78-5
3:5.79-1
3:5.79-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70367.json"