Injection Vulnerability in NousResearch Hermes-Agent Product
CVE-2026-10221

6.9MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10221?

A vulnerability has been identified in NousResearch hermes-agent versions up to 0.12.0, specifically within the _compress_context function located in run_agent.py. This flaw allows for potential remote injection attacks, enabling malicious actors to manipulate the application's processing context. As exploits for this vulnerability are publicly available, it is crucial for users and administrators to assess their exposure and apply necessary patches to mitigate risks. Despite prior notification efforts, the vendor has not provided any response regarding this issue.

Affected Version(s)

hermes-agent 0.1

hermes-agent 0.2

hermes-agent 0.3

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-2026-10221 - Proof of Concept

References

https://vuldb.com/vuln/367500
vdb-entrytechnical-description
https://vuldb.com/vuln/367500/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10221
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
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

Eric-j (VulDB User)
VulDB CNA Team
.