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CVE-2026-82983

Quick assessment

Affected
Nextcloud Tables
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.

Tables 应用的共享列表端点（GET /apps/tables/share/table/{tableId}）在返回完整的共享接收者列表（包括用户、组和团队）及其权限级别之前，未验证请求用户是否拥有该表的“管理”级别权限。仅被授予“读取数据”权限的用户，虽然在前端 Web 界面中被正确阻止查看此类信息，但仍可直接调用该端点，从而枚举该表共享给的所有对象及其访问权限级别。 此问题不会暴露超出“读取数据”权限原本允许范围之外的表数据本身，仅会泄露共享接收者列表及其对应的权限级别。

AI Predicted 5.3 Difficulty: Trivial

Affected Version Matrix 1

VendorProduct Version RangeStatus
Nextcloud Tables 0.8.1≤ 2.0.0 affected
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I. Basic Information for CVE-2026-82983

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting user has manage-level permission on the table before returning the full list of share recipients (users, groups, and teams) along with their permission levels. A user who was only granted read-data access to a table, and who is correctly prevented from seeing this information in the web UI, could call the endpoint directly to enumerate everyone the table is shared with and their access levels. This does not expose the table's data itself beyond what the read-data grant already permits, only the list of share recipients and their permission levels.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nextcloud Tables 0.8.1 ~ 2.0.0 -

II. Public POCs for CVE-2026-82983

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III. Intelligence Information for CVE-2026-82983

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Other References for CVE-2026-82983 (1)

Same Patch Batch · Nextcloud · 2026-10-27 · 9 CVEs total

CVE-2026-87897 Whiteboard SSRF 漏洞：泄露 JWT 并获读写权限
CVE-2026-77173 LibreOffice 文件命名含#致敏感信息未标记
CVE-2026-77172 应用密码绕过敏感端点密码确认漏洞
CVE-2026-77167 Nextcloud 未认证 federated share 端点拒绝服务漏洞
CVE-2026-77171 公共共享集体链接允许创建页面漏洞
CVE-2026-82986 Tableau 用户可绕过管理员设置的分组链接共享限制。
CVE-2026-82984 某软件资源 API 存在越权枚举漏洞
CVE-2026-67400 WOPI 配置信息泄露：缺失 Token 类型检查

IV. Related Vulnerabilities

Same product: Tables
Same vendor: Nextcloud
Same weakness: CWE-200