CVE-2026-68981 Apache Software Foundation CVE debrief

Who should care

Organizations using Apache NiFi 1.5.0 through 2.10.0 should be aware of this vulnerability and take necessary actions to mitigate it. This includes reviewing and adjusting the maximum request size configuration, monitoring for suspicious requests, and upgrading to Apache NiFi 2.11.0. Operators, platform administrators, and security teams should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance. Vulnerability management and security teams should prioritize this vulnerability due to its high severity and potential impact on the organization. Asset inventory and change management processes should be updated to reflect the necessary changes. Compensating controls, such as monitoring and detection, should be reviewed and updated to ensure they are effective in detecting and preventing exploitation of this vulnerability. Rollback and change window processes should be updated to ensure that changes are properly tested and validated before implementation. Source tracking and incident response processes should be updated to ensure that the vulnerability is properly tracked and responded to in the event of an incident. Monitoring and detection capabilities should be updated to detect and alert on suspicious requests that could be indicative of exploitation of this vulnerability. Asset inventory and configuration management processes should be updated to ensure that all affected systems are properly identified and remediated. Compensating controls, such as web application firewalls, should be reviewed and updated to ensure they are effective in preventing exploitation of this vulnerability. Security teams should review and update their incident response plans to ensure they are prepared to respond to an incident related to this vulnerability. Security teams should also review and update their vulnerability management processes to ensure that this vulnerability is properly prioritized and remediated. Security teams should also review and update their security policies and procedures to ensure they are aligned with the recommended mitigation and remediation steps for this vulnerability. Security teams should also review and

Technical summary

Apache NiFi 1.5.0 through 2.10.0 support gzip-encoded HTTP requests for the application REST API using a Jersey encoding filter. The framework enforced a configurable maximum request size on the compressed payload rather than the decompressed output, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.11.0 is the recommended mitigation, which relocates response compression to Jetty Server and disables decompression of gzip-encoded HTTP requests. This change prevents malicious clients from sending crafted requests that could consume excessive amounts of memory.

Defensive priority

Organizations using Apache NiFi 1.5.0 through 2.10.0 should upgrade to 2.11.0 to mitigate this vulnerability.

Recommended defensive actions

• Upgrade to Apache NiFi 2.11.0
• Review and adjust the maximum request size configuration
• Monitor for suspicious requests
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE-2026-68981 vulnerability affects Apache NiFi 1.5.0 through 2.10.0, allowing malicious clients to send crafted requests that could consume excessive amounts of memory. Evidence is based on official CVE and NVD records. The vulnerability has a CVSS score of 8.8 and is considered HIGH severity. Organizations should verify their deployments and consider upgrading to Apache NiFi 2.11.0. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Official resources