PatchTheCVECVE-2026-34598: YesWiki is a wiki system written in PHP
CVE-2026-34598 is a medium-severity flaw (CVSS 6.1) affecting yeswiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
YesWiki is a wiki system written in PHP. Prior to version 4.6.0, a stored and blind XSS vulnerability exists in the form title field. A malicious attacker can inject JavaScript without any authentication via a form title that is saved in the backend database. When any user visits that injected page, the JavaScript payload gets executed. This issue has been patched in version 4.6.0.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34598?
yeswiki: upgrade to 4.6.0. Exact commands for each OS are on this page.
Is CVE-2026-34598 being exploited?
CVE-2026-34598 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34598 affect?
CVE-2026-34598 affects yeswiki. Severity is medium (CVSS 6.1). YesWiki is a wiki system written in PHP. Prior to version 4.6.0, a stored and blind XSS vulnerability exists in the form title field. A malicious attacker can inject JavaScript without any authentication via a form title that is saved in th
How urgent is CVE-2026-34598?
Priority 29/100. Public exploit reference