Apache Software Foundation vulnerabilities and threats

CVE-2026-48834 is a high-severity vulnerability in Apache Answer up to version 2.0.1. It involves improper handling of length parameter inconsistencies, allowing unauthenticated attackers to cause a denial of service by sending a specially crafted Accept-Language header that triggers excessive CPU consumption during parsing. The issue is fixed in version 2.0.2.

It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

** UNSUPPORTED WHEN ASSIGNED ** Stack-based Buffer Overflow vulnerability in Apache Lucy. This issue affects Apache Lucy: all versions. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. Lucy is now maintained outside of the ASF at https://github.com/lucysearch . This issue has been fixed in 0.8.0 there. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

** UNSUPPORTED WHEN ASSIGNED ** Deserialization of Untrusted Data vulnerability in Apache Lucy. This issue affects Apache Lucy: all versions. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. Lucy is now maintained outside of the ASF at https://github.com/lucysearch . 0.8.0 is no longer affected by this issue, because the offending feature has been removed there. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

** UNSUPPORTED WHEN ASSIGNED ** Uncontrolled Recursion vulnerability in Apache Lucy. This issue affects Apache Lucy: all versions. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the ASF. Lucy is now maintained outside of the ASF at https://github.com/lucysearch

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

CVE-2026-68080 is a medium severity vulnerability in Apache Qpid Broker-J affecting versions up to and including 10.0.1. The issue involves insufficient control over the rate at which the broker responds to echo flow messages, allowing an authenticated attacker to cause excessive resource consumption and potential denial of service. The vulnerability is fixed in version 10.1.0.

A resource allocation vulnerability exists in Apache Qpid Proton-Dotnet through version 1.0.0, where the maximum number of transfer frames per incoming delivery could not be limited. This flaw allows an authenticated attacker to cause excessive resource consumption, potentially leading to denial of service. The issue is fixed in version 1.1.0.

Apache Qpid Broker-J versions up to and including 10.0.1 contain a vulnerability where the maximum number of transfer frames per incoming delivery cannot be governed. This allows an authenticated attacker to cause excessive resource usage, potentially leading to denial of service. The issue is fixed in version 10.1.0.

Apache Qpid Proton-J versions up to 0.34.1 have a vulnerability where the maximum number of transfer frames per incoming delivery is not limited. This allows an authenticated attacker to cause excessive resource consumption, potentially leading to denial of service. The issue is fixed in version 0.35.0.

CVE-2026-67554 is a denial of service vulnerability in Apache Qpid Proton Dotnet where an authenticated attacker can send a disposition frame with large or illegal ranges. This causes excessive CPU usage due to improper handling of loop conditions. The issue affects versions up to and including 1.0.0. Upgrading to version 1.1.0 resolves the problem.

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to denial of service. This issue affects Apache Qpid Broker-J: through 10.0.1. Users are recommended to upgrade to version 10.1.0, which fixes the issue.

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Broker-J: through 10.0.1. Users are recommended to upgrade to version 10.1.0, which fixes the issue.

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue