CVE-2026-22777 is a vulnerability classified under CWE-93 (Improper Neutralization of CRLF Sequences) found in Comfy-Org's ComfyUI-Manager extension, which enhances the usability of ComfyUI. The flaw exists in versions prior to 3.39.2 and between 4.0.0 and 4.0.5, where an attacker can inject carriage return and line feed characters (CRLF) into HTTP query parameters. This injection allows the attacker to add arbitrary configuration values to the config.ini file used by the application. Because the config.ini file controls application settings, this can lead to tampering with security configurations or altering the application's behavior in unintended ways. The vulnerability can be exploited remotely over the network without requiring authentication or user interaction, making it particularly dangerous. The CVSS 3.1 score of 7.5 reflects a high severity, primarily due to the high impact on integrity and the ease of exploitation (network vector, low attack complexity). Although no known exploits are reported in the wild, the potential for misuse is significant. The issue has been addressed in versions 3.39.2 and 4.0.5 by properly sanitizing input to prevent CRLF injection and unauthorized modification of configuration files.

For European organizations, this vulnerability poses a significant risk to the integrity of applications relying on ComfyUI-Manager. Unauthorized modification of configuration files can lead to weakened security postures, enabling further attacks such as privilege escalation, bypassing security controls, or persistent backdoors. Organizations in sectors like finance, healthcare, and critical infrastructure that use ComfyUI-Manager for automation or UI management could face operational disruptions or data integrity issues. The remote, unauthenticated nature of the exploit increases the attack surface, especially for internet-facing deployments. Additionally, tampering with configuration files might evade detection if monitoring is insufficient, leading to prolonged compromise. The absence of known exploits currently provides a window for proactive mitigation, but the high CVSS score underscores the urgency of patching.

1. Immediately upgrade ComfyUI-Manager to versions 3.39.2 or 4.0.5 where the vulnerability is patched. 2. Implement strict input validation and sanitization on all HTTP query parameters to prevent injection of CRLF or other special characters. 3. Monitor the integrity of configuration files such as config.ini using file integrity monitoring tools to detect unauthorized changes promptly. 4. Restrict network access to the ComfyUI-Manager interface, limiting exposure to trusted networks or VPNs. 5. Employ web application firewalls (WAFs) with rules to detect and block CRLF injection attempts. 6. Conduct regular security audits and penetration testing focusing on injection vulnerabilities. 7. Educate developers and administrators about secure coding and configuration management practices to prevent similar issues.