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webgjc web_robot EUVDEUVD-2026-76934

| CVE-2026-90492 LOW
OS Command Injection (CWE-78)
2026-09-13 VulDB GHSA-ff59-mhrh-hcvf
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.8 HIGH

Network-reachable OS command injection with no authentication; UI:R maps CVSS 4.0 UI:P; C/I/A:H reflects realistic command injection impact independent of conservative input scoring.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Severity Changed
Sep 13, 2026 - 02:22 NVD
MEDIUM LOW
CVSS changed
Sep 13, 2026 - 02:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Analysis Generated
Sep 13, 2026 - 01:58 vuln.today

DescriptionCVE.org

A security vulnerability has been detected in webgjc web_robot 2.4.0/2.5.0/2.8.0. The affected element is the function controller_listen/controller_recover of the file py/web.py. The manipulation of the argument case_name leads to os command injection. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

OS command injection in webgjc web_robot versions 2.4.0, 2.5.0, and 2.8.0 enables remote attackers to execute arbitrary operating system commands by supplying malicious input through the case_name parameter handled by the controller_listen or controller_recover functions in py/web.py. A publicly disclosed proof-of-concept exploit exists, the vendor failed to respond to responsible disclosure, and no patch has been released. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires network access to a running webgjc web_robot instance (versions 2.4.0, 2.5.0, or 2.8.0) with the web interface and specifically the controller_listen or controller_recover HTTP endpoints reachable from the attacker's network position. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The reported CVSS 4.0 score of 5.3 (Medium) with impact metrics VC:L/VI:L/VA:L appears significantly conservative for an OS command injection primitive, which in practice grants arbitrary OS-level command execution and typically maps to high confidentiality, integrity, and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch identified at time of analysis, as the vendor did not respond to responsible disclosure. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-76934 vulnerability details – vuln.today

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