Quick answers
- Is CVE-2026-116826 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-116826 being exploited in the wild.
- How severe is CVE-2026-116826?
- Medium severity, with a CVSS score of 6.8, published 27 October 2026.
- Which products and versions are affected?
- YesWiki before 4.7.0.
- Is there a fix for CVE-2026-116826?
- Yes: fixed in 4.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-116826 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-116826?
- Check whether you run YesWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 4.7.0
Technical details
The DuplicationManager::downloadFile() method in the page duplication API passes attacker-controlled URLs directly to curl_init() without SSRF protection, scheme validation, or protocol filtering. An authenticated administrator can POST crafted URLs to /api/pages/{tag}/duplicate with file:// or http:// protocols in the files array, and responses are written to the web-accessible files/ directory without extension restrictions. The vulnerability requires administrative authentication but results in read-back SSRF with arbitrary file write capabilities accessible to any unauthenticated visitor.
Affected products
- YesWiki YesWiki before 4.7.0
Timeline
- 2026-10-12: disclosed
- 2026-10-27: advisory