CVE-2026-116827 Details
Description
YesWiki before 4.7.0 contains a server-side request forgery vulnerability in the Bazar CSV import copyUrlToLocalFile() function that allows authenticated administrators to make arbitrary outbound requests by supplying crafted URLs in CSV file or image fields. Attackers can bypass the extension check with a query-string suffix or redirects to fetch cloud metadata credentials, internal services, or local files via file://, with responses stored in the web-accessible files/ directory.
A server-side request forgery (SSRF) vulnerability has been identified in YesWiki versions prior to 4.7.0. The issue resides in the Bazar CSV import feature, specifically within the 'copyUrlToLocalFile()' function. This vulnerability allows authenticated administrators to make arbitrary outbound requests by inserting crafted URLs into CSV file or image fields. Exploitation is possible by bypassing extension checks with query-string suffixes or redirects, enabling the retrieval of cloud metadata credentials, access to internal services, or local files via the 'file://' protocol. The responses are then stored in the web-accessible 'files/' directory.
Users are advised to update YesWiki to version 4.7.0 or later, where this vulnerability has been patched. As an interim measure, access to the CSV import action should be restricted to trusted users, and outbound connections from the web server process should be monitored.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 27, 2026CISA-ADP
Assessed Nov 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v38g-qc7g-q3mq | CISA-ADP | AdvisoryExploitTechnical AnalysisVendor |
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v38g-qc7g-q3mq | [email protected] | AdvisoryExploitTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-ssrf-via-copyurltolocalfile-in-bazar-csv-import | [email protected] | AdvisoryVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| YesWiki | <= 4.6.7 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 3, 2026 | CVE Modified | CISA-ADP |
| Oct 27, 2026 | New CVE Received | [email protected] |