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CVE-2026-18775: Server-Side Request Forgery in NousResearch hermes-agent

0
Medium
VulnerabilityCVE-2026-18775cvecve-2026-18775
Published: 08/04/2026 (08/04/2026, 16:15:09 UTC)
Source: CVE Database V5
Vendor/Project: NousResearch
Product: hermes-agent

Description

CVE-2026-18775 is a server-side request forgery (SSRF) vulnerability in the NousResearch hermes-agent up to version 0.16.0. It affects the browser_snapshot function in the tools/browser_tool.py component. The vulnerability can be exploited remotely and the exploit has been publicly disclosed. The vendor has not responded to the disclosure. The CVSS 4.0 base score is 5.3, indicating a medium severity.

CVSS v4.0

Score 5.3medium

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
Low
Vuln. Availability
Low
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Affected software

hermes-agent
pkg:pypi/hermes-agent
Affected versions
=0.1=0.2=0.3=0.4=0.5=0.6=0.7=0.8=0.9=0.10=0.11=0.12=0.13=0.14=0.15=0.16.0
CPE configurations
cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:*

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/04/2026, 16:45:48 UTC

Technical Analysis

This vulnerability in NousResearch hermes-agent (versions 0.1 through 0.16.0) allows an attacker to manipulate the browser_snapshot function in the Browser Tooling component, leading to server-side request forgery (SSRF). SSRF vulnerabilities enable attackers to make the server perform unauthorized requests, potentially accessing internal resources. The vulnerability can be exploited remotely without user interaction and requires low privileges. The vendor was notified but has not provided a response or patch. No official remediation or patch is currently documented.

Potential Impact

Successful exploitation of this SSRF vulnerability could allow an attacker to induce the affected server to send crafted requests to internal or external systems, potentially leading to information disclosure or interaction with internal services not otherwise accessible. The CVSS score of 5.3 reflects a medium impact with low attack complexity and no user interaction required. However, no known active exploitation in the wild has been reported.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded or released a fix, users should monitor official channels for updates. Until a patch is available, consider restricting network access from the hermes-agent to sensitive internal resources and applying network-level controls to limit SSRF impact.

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Technical Details

Data Version
5.2
Assigner Short Name
VulDB
Date Reserved
2026-08-04T07:35:48.345Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a72133ebf8831d5391ad473

Added to database: 08/04/2026, 16:28:46 UTC

Last enriched: 08/04/2026, 16:45:48 UTC

Last updated: 08/04/2026, 17:29:58 UTC

Views: 5

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