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CVE-2026-116827— YesWiki before 4.7.0 SSRF via copyUrlToLocalFile in Bazar CSV Import

Quick assessment

Affected
YesWiki yeswiki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

YesWiki 4.7.0 之前的版本存在服务端请求伪造（SSRF）漏洞，该漏洞位于 Bazar 组件的 CSV 导入功能中的 函数。已认证的管理员可通过在 CSV 文件或图片字段中提供特制的 URL，发起任意外部请求。攻击者可利用查询字符串后缀或重定向机制绕过文件扩展名检查，从而窃取云元数据凭证、访问内部服务，或通过 协议读取本地文件；相关响应内容将被存储于可通过 Web 访问的 目录中。

CVSS 6.8 · Medium
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I. Basic Information for CVE-2026-116827

Vulnerability Information
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Vulnerability Title
YesWiki before 4.7.0 SSRF via copyUrlToLocalFile in Bazar CSV Import
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
YesWiki yeswiki 0 ~ 4.7.0 -

II. Public POCs for CVE-2026-116827

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III. Intelligence Information for CVE-2026-116827

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Other References for CVE-2026-116827 (2)

Same Patch Batch · YesWiki · 2026-10-26 · 9 CVEs total

CVE-2026-116826 6.8 MEDIUM YesWiki before 4.7.0 Authenticated SSRF via Page Duplication API downloadFile
CVE-2026-116821 6.5 MEDIUM YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames
CVE-2026-116825 6.5 MEDIUM YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox
CVE-2026-116823 6.1 MEDIUM YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback
CVE-2026-116824 6.1 MEDIUM YesWiki before 4.7.0 Stored XSS via Referer Header in referrers_sites Handler
CVE-2026-116822 5.3 MEDIUM YesWiki before 4.7.0 Template Traversal via BazarListeAction template Parameter
CVE-2026-116820 5.3 MEDIUM YesWiki from 4.6.0 before 4.7.0 SQL Query Disclosure via showreq Parameter
CVE-2026-116828 4.9 MEDIUM YesWiki before 4.7.0 SQL Injection via despam.php INTERVAL operand

IV. Related Vulnerabilities

Same product: yeswiki
Same vendor: YesWiki
Same weakness: CWE-918