CVE-2025-6107Public exploitNetwork attack vector

Denial of service via class attribute pollution

Published Jun 16, 2025 · Updated Jun 23, 2025

Class pollution in ComfyUI 0.3.40 allows remote attackers to disrupt model processing through a crafted ControlLoRA model. The comfy/utils.py set_attr path splits attacker-controlled state-dictionary keys and traverses attributes without blocking class-level paths before calling setattr. Loading the model is required, and polluted Python class state causes repeated model operations to fail, producing persistent denial of service.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Class pollution in ComfyUI 0.3.40 allows remote attackers to disrupt model processing through a crafted ControlLoRA model. The comfy/utils.py set_attr path splits attacker-controlled state-dictionary keys and traverses attributes without blocking class-level paths before calling setattr. Loading the model is required, and polluted Python class state causes repeated model operations to fail, producing persistent denial of service.

The record

CVE
CVE-2025-6107
Published
Jun 16, 2025
Updated
Jun 23, 2025
Vendor
Comfy Org
Product
ComfyUI
Classifications
CWE-915, CWE-913, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0.3.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Comfy Org · ComfyUIversion=0.3.40

Published CVSS scores

2.3VulDB CNACVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.1VulDB CNACVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
3.1VulDB CNACVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
2.6VulDB CNAAV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-915Dynamically-Determined Object Attributes
CWE-913Dynamically-Managed Code Resources
T1499Endpoint Denial of Service

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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