What is CVE-2026-104471?

CVE-2026-104471 is a high-severity vulnerability in Yeswiki, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-10-02.

How severe is CVE-2026-104471?

High severity. CVSS v3 base score is 7.2 out of 10.

Arbitrary file upload in Yeswiki

CVE-2026-104471

YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that allows authenticated admins to write remote files into the web-accessible files/ directory via Bazar CSV import preview. Attackers can import a CSV whose file or image field references a remote .php URL, which is saved without extension checks and executed as server-side code.

Vulnerability class: Unrestricted File Upload

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

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-v3gq-c7c6-mxw3 (vendor-advisory)
www.vulncheck.com/advisories/yeswiki-before-4.6.7-unrestricted-file-upload-via-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104471?: CVE-2026-104471 is a high-severity vulnerability in Yeswiki, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-10-02.
How severe is CVE-2026-104471?: High severity. CVSS v3 base score is 7.2 out of 10.