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8.1
CVE-2026-104453: YesWiki before 4.6.7 lets attackers delete tags
CVE-2026-104453 · published 1 month ago
Summary
If an administrator of a YesWiki site clicks a specially crafted link, an attacker can cause tags to be removed from the wiki without permission. The problem works because the site does not verify that the request really came from the administrator. Apply the update that fixes this issue or restrict admin actions to trusted browsers until you can upgrade.
What to do
- Update yeswiki yeswiki to version 4.6.7 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| yeswiki | yeswiki | < 4.6.7 |
Original advisory text
YesWiki before 4.6.7 CSRF Tag Deletion via admintag Action
YesWiki before 4.6.7 contains a cross-site request forgery vulnerability in the admintag action that allows attackers to delete tag associations by luring administrators to crafted GET links. Attackers can supply a wide id range in the delete_tag parameter via top-level navigation, carrying the SameSite=Lax admin cookie, to bulk-delete tag triples.
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-5c27-6gcm-hc7x Vendor Advisory
- https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-csrf-tag-deletion-via-... Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-1044... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-104453 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Severity
8.1
High
Type
CWE-352Cross-Site Request Forgery (CSRF)
Timeline
Published2 Oct 2026
Updated4 Nov 2026
First seen2 Oct 2026
Sources
CVE-2026-104453 · NVD
CVE-2026-104453 · MITRE
CVE-2026-104453 · OSV
GHSA-5c27-6gcm-hc7x · GHSA
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