DEBIAN-CVE-2026-70367: stunnel security update

DEBIAN-CVE-2026-70367, released August 8, 2026, fixes 1 CVE in stunnel (version 3:5.80-1). None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

5.4

Base score, 0 to 10

Highest EPSS

0.0022

13th percentile

Fixed package versions

Product	Release	Fixed in
stunnel	Debian 14	3:5.80-1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-70367	Stunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified addresses allows access to loopback-only services	5.4	0.0022	None reported

Also fixes CVE-2026-70367

OPENSUSE-SU-2026:22088-1
stunnel on opensuse-leap 16.0
SUSE-SU-2026:24232-1
stunnel on sles 16.0
SUSE-SU-2026:4617-1
stunnel on sles 15.7

Vendor advisory

https://security-tracker.debian.org/tracker/CVE-2026-70367

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