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CVE-2026-121881— Posit Workbench code-server session-state RPC (get_last_seen) SQL injection

Quick assessment

Affected
Posit Software, PBC Posit Workbench
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.

Posit Software, PBC 的 Posit Workbench 在 2026.08.0 版本之前，其 代码服务器（code-server）会话状态 RPC 接口存在 SQL 注入漏洞。该漏洞允许已认证用户通过 参数读取 Workbench 数据库中的任意数据。 注意：利用此漏洞需要有效的已认证会话，无需管理员权限。该漏洞的影响范围仅限于数据库内容的泄露。

CVSS 5.7 · Medium
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I. Basic Information for CVE-2026-121881

Vulnerability Information
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Vulnerability Title
Posit Workbench code-server session-state RPC (get_last_seen) SQL injection
Source: CVE Program / CVE List V5
Vulnerability Description
SQL injection vulnerability in the get_last_seen code-server session-state RPC in Posit Software, PBC Posit Workbench before 2026.08.0 allows authenticated users to read arbitrary data from the Workbench database via the sessionIds parameter. NOTE: exploitation requires a valid authenticated session; no administrative privileges are needed. The vulnerability is limited to disclosure of database contents.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:C/RE:M/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Posit Software, PBC Posit Workbench 0 ~ 2026.08.0 cpe:2.3:a:posit:workbench:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-121881

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III. Intelligence Information for CVE-2026-121881

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Other References for CVE-2026-121881 (2)

IV. Related Vulnerabilities

Same product: Posit Workbench
Same vendor: Posit Software, PBC
Same weakness: CWE-89