CVE-2026-22777: ComfyUI-Manager is Vulnerable to CRLF Injection in Configuration Handler
Impact
Vulnerability Type: CRLF Injection via ConfigParser
An attacker can inject special characters into HTTP query parameters to add arbitrary configuration values to the config.ini file. This can lead to security setting tampering or modification of application behavior.
Affected Users: Users running ComfyUI-Manager in environments where ComfyUI is configured with the --listen option to allow remote access.
CVSS Score: 7.5 (High)
Patches
Fixed in the following versions: - 3.39.2 (v3.x branch) - 4.0.5 (v4.x branch)
Sanitization logic was added to the writeconfig() function to remove CRLF and NULL characters from all string values.
Workarounds
If upgrading is not possible: - Run ComfyUI-Manager only on trusted networks - Block external access via firewall - Run on localhost only without the --listen option
References
- CWE-93: Improper Neutralization of CRLF Sequences - OWASP CRLF Injection
Credit
This vulnerability was reported by: - 李存义 <xiaoheihei1107@gmail.com> - D0n9 Li <wyd0n9@gmail.com> - Swings <swing@mail.exp.sh> - Osword from SGLAB of Legendsec at Qi'anxin Group <zhzhdoai@gmail.com>
Other sources
ComfyUI-Manager is an extension designed to enhance the usability of ComfyUI. Prior to versions 3.39.2 and 4.0.5, an attacker can inject special characters into HTTP query parameters to add arbitrary configuration values to the config.ini file. This can lead to security setting tampering or modification of application behavior. This issue has been patched in versions 3.39.2 and 4.0.5.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22777?
CVE-2026-22777 has a moderate severity rating due to potential unauthorized modification of sensitive configuration settings.
How do I fix CVE-2026-22777?
To fix CVE-2026-22777, update ComfyUI-Manager to version 3.39.2 or later, or 4.0.5 or later.
What types of software are affected by CVE-2026-22777?
CVE-2026-22777 affects ComfyUI-Manager prior to versions 3.39.2 and 4.0.5.
What kind of attack does CVE-2026-22777 allow?
CVE-2026-22777 allows an attacker to inject special characters into HTTP query parameters, leading to arbitrary configuration changes.
What is the potential impact of CVE-2026-22777?
The potential impact of CVE-2026-22777 includes unauthorized modification of security settings, which could compromise system integrity.