CVE-2026-104470: YesWiki before 4.6.7 SSRF via Bazar valeur Action url Parameter

Severity: medium (CVSS 5.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-04
Weakness: CWE-918

Description

YesWiki before 4.6.7 contains a server-side request forgery vulnerability that allows page editors to make the server fetch arbitrary URLs via the url parameter of the Bazar valeur action. Attackers can embed the action with a champ parameter in wiki markup to reach loopback or internal services and partially read responses rendered into the page.

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/commit/22a5260b0381824e01d340ce9457c4adb9e18b23
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6rvf-7pwm-6j44
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-via-bazar-valeur-action-url-parameter
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6rvf-7pwm-6j44

Get alerted when CVE-2026-104470 or the next vulnerability affects your stack