CVE-2026-76905 getkin CVE debrief

Who should care

Developers and administrators using kin-openapi versions between 0.10.0 and 0.141.0 should be aware of this vulnerability and take steps to mitigate it. This includes updating to version 0.141.0 or later, implementing input validation and sanitization for request bodies, and monitoring for and handling validation errors securely. Additionally, operators and security teams should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance, and plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Vulnerability management teams should track exceptions, retest remediated assets, and close the item only after evidence is documented. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, detection, and logs for exposed assets that need extra review. Asset inventory management should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Change management processes should be used to implement and verify remediation, and source tracking should be used to monitor for potential attacks. Rollback/change windows should be used to minimize downtime during remediation. Monitoring and detection capabilities should be reviewed to ensure they can detect potential attacks. Asset inventory and configuration management should be used to identify and track affected systems. Security teams should also consider implementing additional security controls, such as web application firewalls or intrusion detection systems, to detect and prevent potential attacks. Finally, security teams should review and update their incident response plans to ensure they are prepared to respond to potential attacks exploiting this vulnerability. IT operations teams should also review and update their procedures for handling validation errors and denial-of-service attacks. Compliance teams should review and update their compliance procedures to ensure they are aligned with the updated security controls. Audit teams should review and update their audit procedures to

Technical summary

The openapi3filter.convertParseError function in openapi3filter/validation_error_encoder.go does not check if e.Parameter is nil before dereferencing e.Parameter.In. This can cause applications that use openapi3filter.ConvertErrors or ValidationErrorEncoder to panic when encountering a malformed non-string scalar field in a multipart/form-data request body. The vulnerability is fixed in version 0.141.0. Affected applications should be updated to this version or later to prevent potential denial-of-service attacks. Developers should also implement input validation and sanitization for request bodies to mitigate this vulnerability.

Defensive priority

High priority due to potential for DoS attacks

Recommended defensive actions

• Update kin-openapi to version 0.141.0 or later
• Implement input validation and sanitization for request bodies
• Monitor for and handle validation errors securely
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The evidence from the CVE record and NVD detail suggests that the vulnerability exists in kin-openapi versions from 0.10.0 to 0.141.0. The fix is included in version 0.141.0. To verify, defenders should check the version of kin-openapi in use and review the official advisory for specific guidance on affected scope and severity. Additionally, defenders should monitor for and handle validation errors securely to prevent potential denial-of-service attacks.

Official resources