CVE-2026-18774 - Vulnerability Details

- NousResearch hermes-agent xAI Image Generation Provider image_gen_provider.py save_url_image server-side request forgery

Description

A flaw has been found in NousResearch hermes-agent up to 0.16.0. This affects the function save_url_image of the file agent/image_gen_provider.py of the component xAI Image Generation Provider. This manipulation causes server-side request forgery. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Published: 2026-08-04

Score: 5.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

A flaw in the save_url_image function of the xAI Image Generation Provider in NousResearch hermes‑agent allows an attacker to trigger server‑side request forgery (SSRF). The vulnerability can be triggered from a remote location and has been publicly published, meaning a remote attacker can instruct the agent to make arbitrary requests to internal or external resources. This capability could expose internal services, leak sensitive data, or facilitate further attacks such as data exfiltration or denial of service.

Affected Systems

Versions of NousResearch hermes‑agent up to and including 0.16.0 are affected. The vulnerability resides in agent/image_gen_provider.py within the xAI Image Generation Provider component.

Risk and Exploitability

The CVSS score for this flaw is 5.3, indicating moderate severity. The EPSS score is not available, and it is not listed in CISA KEV. The attack vector is remote, relying on remote input that triggers the vulnerable function. Exploitation requires an attacker to supply a crafted URL, after which the agent will perform the request as the service user.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

NousResearch

hermes-agent

affected

Version	Status	Constraints
`0.1`	affected	—
`0.2`	affected	—
`0.3`	affected	—
`0.4`	affected	—
`0.5`	affected	—
`0.6`	affected	—
`0.7`	affected	—
`0.8`	affected	—
`0.9`	affected	—
`0.10`	affected	—
`0.11`	affected	—
`0.12`	affected	—
`0.13`	affected	—
`0.14`	affected	—
`0.15`	affected	—
`0.16.0`	affected	—

No data.

Vendor Product Confidence Versions

Nousresearch

Hermes-agent

95%

Version	Status	Scheme	Platform
`0.1`	affected	generic	—
`0.2`	affected	generic	—
`0.3`	affected	generic	—
`0.4`	affected	generic	—
`0.5`	affected	generic	—
`0.6`	affected	generic	—
`0.7`	affected	generic	—
`0.8`	affected	generic	—
`0.9`	affected	generic	—
`0.10`	affected	generic	—
`0.11`	affected	generic	—
`0.12`	affected	generic	—
`0.13`	affected	generic	—
`0.14`	affected	generic	—
`0.15`	affected	generic	—
`0.16.0`	affected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Upgrade to a version of NousResearch hermes‑agent newer than 0.16.0 if available; this is the official vendor solution.
Restrict outbound HTTP/HTTPS requests from the hermes‑agent or implement URL validation to allow only trusted hosts; this prevents the agent from contacting unintended internal resources.
Apply network segmentation or firewall rules to block the hermes‑agent’s ability to reach sensitive internal services, mitigating the impact of a successful SSRF.

Generated by OpenCVE AI on August 4, 2026 at 19:28 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00201.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://gist.github.com/YLChen-007/7c71603a25d84f372f2275dd570e99d4
https://vuldb.com/cve/CVE-2026-18774
https://vuldb.com/submit/856875
https://vuldb.com/vuln/385784
https://vuldb.com/vuln/385784/cti

History

Wed, 05 Aug 2026 14:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 04 Aug 2026 16:30:00 +0000

Type	Values Removed	Values Added
Description		A flaw has been found in NousResearch hermes-agent up to 0.16.0. This affects the function save_url_image of the file agent/image_gen_provider.py of the component xAI Image Generation Provider. This manipulation causes server-side request forgery. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Title		NousResearch hermes-agent xAI Image Generation Provider image_gen_provider.py save_url_image server-side request forgery
First Time appeared		Nousresearch Nousresearch hermes-agent
Weaknesses		CWE-918
CPEs		cpe:2.3:a:nousresearch:hermes-agent::::::::
Vendors & Products		Nousresearch Nousresearch hermes-agent
References		https://gist.github.com/YLChen-007/7c71603a25d84f372f2275dd570e99d4 https://vuldb.com/cve/CVE-2026-18774 https://vuldb.com/submit/856875 https://vuldb.com/vuln/385784 https://vuldb.com/vuln/385784/cti
Metrics		cvssV2_0 `{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}` cvssV3_0 `{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV4_0 `{'score': 5.3, 'vector': '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'}`

Subscriptions

Nousresearch Hermes-agent

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-08-04T16:00:11.053Z

Updated: 2026-08-05T13:42:12.621Z

Reserved: 2026-08-04T07:35:41.048Z

Link: CVE-2026-18774

Vulnrichment

Updated: 2026-08-05T13:42:08.210Z

NVD

Status : Deferred

Published: 2026-08-04T17:16:48.127

Modified: 2026-08-12T20:59:00.027

Link: CVE-2026-18774

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-04T19:30:05Z

Weaknesses

CWE-918
Server-Side Request Forgery (SSRF)

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

Exploitation poc

Automatable no

Technical Impact partial

Subscriptions

JSON object

JSON object

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JSON object

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