CVE-2026-18774Public exploitNetwork attack vector

SSRF via unvalidated provider-returned image URL

Published Aug 4, 2026 · Updated Aug 4, 2026

SSRF in Hermes Agent 0.1 through 0.16.0 allows remote authenticated users to trigger host-side requests through xAI image generation. The xAI response parser forwards data[0].url to save_url_image, which calls requests.get without validating the destination or redirect targets. Exploitation requires low-privileged access plus an enabled or relayed xAI provider that returns an attacker-chosen URL, exposing network services reachable from the Hermes host.

CVSS severity6.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Hermes Agent 0.1 through 0.16.0 allows remote authenticated users to trigger host-side requests through xAI image generation. The xAI response parser forwards data[0].url to save_url_image, which calls requests.get without validating the destination or redirect targets. Exploitation requires low-privileged access plus an enabled or relayed xAI provider that returns an attacker-chosen URL, exposing network services reachable from the Hermes host.

The record

CVE
CVE-2026-18774
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1
  2. Affected versionversion=0.10
  3. Affected versionversion=0.11
  4. Affected versionversion=0.12
  5. Affected versionversion=0.13
  6. Affected versionversion=0.14
  7. Affected versionversion=0.15
  8. Affected versionversion=0.16.0
  9. Affected versionversion=0.2
  10. Affected versionversion=0.3
  11. Affected versionversion=0.4
  12. Affected versionversion=0.5
  13. Affected versionversion=0.6
  14. Affected versionversion=0.7
  15. Affected versionversion=0.8
  16. Affected versionversion=0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nous Research · Hermes Agentversion=0.1; version=0.10; version=0.11; version=0.12; version=0.13; version=0.14; version=0.15; version=0.16.0; version=0.2; version=0.3; version=0.4; version=0.5; version=0.6; version=0.7; version=0.8; version=0.9

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS: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
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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