CVE-2026-104458

MEDIUM 6.5

YesWiki before 4.6.7 SSRF Guard Bypass via IPv6 Transition Addresses

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in validateKeyIdUrl() that allows unauthenticated attackers to bypass the SSRF guard using 6to4, NAT64, or IPv4-compatible IPv6 addresses. Attackers can send a crafted Signature keyId to the public actor inbox route to reach cloud metadata, loopback services, or internal hosts.

CWE	CWE-918
Vendor	yeswiki
Product	yeswiki
Published	Oct 2, 2026

Stay Ahead of the Next One

Get instant alerts for yeswiki yeswiki

Be the first to know when new medium vulnerabilities affecting yeswiki yeswiki are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

YesWiki / yeswiki

0 < 4.6.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwm vulncheck.com: https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-guard-bypass-via-ipv6-transition-addresses

Credits

🔍 tonghuaroot