Denial of Service Vulnerability in simular-ai Agent-S Product by Simular AI
CVE-2026-84887

5.3MEDIUM

Key Information:

Vendor

Simular-ai

Status
Agent-s
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84887?

A denial of service vulnerability exists in the simular-ai Agent-S, specifically linked to the file grounding.py within the Model-generated GUI Action Execution Workflow. This flaw can be exploited remotely, allowing attackers to disrupt service functionality. Publicly available exploit methods increase the urgency for users of affected versions to implement necessary security measures. Despite early disclosure attempts, the vendor has not responded to address this critical issue.

Affected Version(s)

Agent-S 0.3.0

Agent-S 0.3.1

Agent-S 0.3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-84887 - Proof of Concept

References

https://vuldb.com/vuln/398136
vdb-entry
https://vuldb.com/vuln/398136/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84887
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

outlookgp (VulDB User)
VulDB CNA Team
.