CVE-2026-104472: YesWiki before 4.6.7 Missing Authorization via Attachment Download Handler

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-862

Description

YesWiki before 4.6.7 contains a missing authorization vulnerability in the attachment download handler that allows unauthenticated attackers to bypass page read ACLs. Attackers can request the download handler with a known page tag and file parameter to retrieve confidential attachments from read-restricted pages.

Affected products

yeswiki: before 4.6.7 — fixed in 4.6.7

How to fix

Upgrade to a fixed version: yeswiki 4.6.7. Check the vendor advisory for mitigations.

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7cj2-9pgf-vcw2
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-missing-authorization-via-attachment-download-handler
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7cj2-9pgf-vcw2

Get alerted when CVE-2026-104472 or the next vulnerability affects your stack