CVE-2026-55546Public exploitNetwork attack vector

Code execution via unrestricted SymPy expression parsing

Published Aug 25, 2026 · Updated Aug 25, 2026

Code injection in QWED AI QWED MCP before 0.2.1 allows remote attackers to execute operating-system commands via crafted math input. The verify_math_expression function passes expression and claimed_result strings to SymPy parse_expr with Python built-ins available and without AST validation. Exploitation requires a downstream integration to supply attacker-controlled input because the default MCP tool registry does not expose this function.

CVSS severity9.8
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in QWED AI QWED MCP before 0.2.1 allows remote attackers to execute operating-system commands via crafted math input. The verify_math_expression function passes expression and claimed_result strings to SymPy parse_expr with Python built-ins available and without AST validation. Exploitation requires a downstream integration to supply attacker-controlled input because the default MCP tool registry does not expose this function.

The record

CVE
CVE-2026-55546
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
QWED AI
Product
QWED MCP
Classifications
CWE-94, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QWED AI · QWED MCPversion=< 0.2.1

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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