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CVE-2026-66143 Apache CVE debrief

Apache Neethi 3.2.2 has a vulnerability that allows bypassing the maximum number of normalized policy alternatives via crafted policies, potentially leading to a denial of service attack through resource consumption. This issue arises from the software's inability to properly handle certain policy configurations, which can be exploited to cause resource exhaustion. Users are advised to upgrade to version 3.2.3 to fix this issue. The vulnerability is considered high severity and requires immediate attention from users of the affected software.

Vendor
Apache
Product
Neethi
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-24
Original CVE updated
2026-07-27
Advisory published
2026-07-24
Advisory updated
2026-07-27

Who should care

Users of Apache Neethi 3.2.2 should be aware of this vulnerability and take steps to upgrade to version 3.2.3. This includes administrators, developers, and security teams responsible for maintaining and securing software environments that utilize Apache Neethi. The vulnerability's impact on system resource consumption and potential for denial of service attacks makes it a critical concern for anyone using the affected version.

Technical summary

The vulnerability in Apache Neethi 3.2.2 allows for the bypassing of the maximum number of normalized policy alternatives through crafted policies. This could lead to a denial of service attack by causing resource consumption. The issue is addressed in version 3.2.3. The vulnerability is related to the policy normalization process in Neethi, which can be manipulated to exceed the maximum allowed alternatives, leading to potential system resource depletion.

Defensive priority

High priority should be given to upgrading Apache Neethi to version 3.2.3 to mitigate this vulnerability. Additionally, reviewing and updating policies, monitoring resource consumption, and confirming affected deployments are crucial steps in defending against potential attacks.

Recommended defensive actions

  • Upgrade Apache Neethi to version 3.2.3
  • Review and update policies to prevent crafted policy attacks
  • Monitor for unusual resource consumption patterns
  • 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

Evidence notes

The CVE record was published on 2026-07-24T13:18:29.350Z and was last modified on 2026-07-27T14:35:07.563Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect the full scope of affected systems or potential impacts. Users should verify the details with the official CVE record and NVD entry for the most accurate and up-to-date information.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-24T13:18:29.350Z and has not been modified since then. The NVD entry is currently Analyzed.