What is CVE-2026-104459?

CVE-2026-104459 is a medium-severity vulnerability in Yeswiki, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-10-02.

How severe is CVE-2026-104459?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Yeswiki

CVE-2026-104459

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in WebfingerService that allows unauthenticated attackers to trigger HTTPS requests to internal hosts. Attackers can POST a crafted actor_handle with a numeric host and port to the abonnements view to probe internal HTTPS services and ports.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yeswiki

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-x4mq-qxvc-g82j (vendor-advisory)
www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-via-activitypub-webfinge… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104459?: CVE-2026-104459 is a medium-severity vulnerability in Yeswiki, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-10-02.
How severe is CVE-2026-104459?: Medium severity. CVSS v3 base score is 6.5 out of 10.