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CVE-2026-55585— QWED: Authenticated Remote Code Execution via Unsafe SymPy `parse_expr()`

Quick assessment

Affected
QWED-AI qwed-verification
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.

QWED Verification是QWED组织开源的一款用于大语言模型（LLM）与 AI Agent 的开源确定性验证基础设施。 QWED Verification 5.1.2之前版本存在代码注入漏洞，该漏洞源于未对用户控制的数学表达式进行安全限制，直接传递给SymPy parse_expr()处理，可能导致任意代码执行。

CVSS 8.8 · High EPSS 0.78% · P55

Affected Version Matrix 1

VendorProduct Version RangeStatus
QWED-AI qwed-verification < 5.1.2 affected
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I. Basic Information for CVE-2026-55585

Vulnerability Information
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Vulnerability Title
QWED: Authenticated Remote Code Execution via Unsafe SymPy `parse_expr()`
Source: CVE Program / CVE List V5
Vulnerability Description
QWED is open-source AI verification infrastructure for deterministic verification of LLM outputs, tool calls, code, schemas, and agent state before production execution. Prior to 5.1.2, the qwed package passes caller-controlled math expressions directly to SymPy parse_expr() without restricted global_dict and local_dict namespaces, allowing Python eval() to resolve builtins and execute arbitrary Python code in the API server process. In src/qwed_new/api/main.py, POST /verify/math is protected by get_current_tenant but accepts any valid tenant API key, reads the expression field, applies only a cosmetic re.sub(r'(\d)(()', r'\1*\2', expression) normalization, and passes the result to parse_expr(). In src/qwed_new/core/batch.py, POST /verify/batch sends math items through batch_service.create_job(), stores item.query verbatim, and _verify_item() passes VerificationType.MATH input to parse_expr() without sanitization. The default-enabled POST /auth/signup endpoint allows anyone to create a standard tenant account, POST /auth/api-keys issues an x-api-key, and either vulnerable path can then be used to read or write files, modify data, execute operating system commands, terminate the service, and compromise other tenants in a shared deployment. This issue is fixed in version 5.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
QWED Verification 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QWED Verification是QWED组织开源的一款用于大语言模型（LLM）与 AI Agent 的开源确定性验证基础设施。 QWED Verification 5.1.2之前版本存在代码注入漏洞，该漏洞源于未对用户控制的数学表达式进行安全限制，直接传递给SymPy parse_expr()处理，可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
QWED-AI qwed-verification < 5.1.2 -

II. Public POCs for CVE-2026-55585

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III. Intelligence Information for CVE-2026-55585

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Patches & Fixes for CVE-2026-55585 (2)

Vendor Advisories for CVE-2026-55585 (1)

IV. Related Vulnerabilities

Same vendor: QWED-AI
Same weakness: CWE-94

V. Comments for CVE-2026-55585

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