CVE-2026-83632 in Thrift
Summary
by MITRE • 10/02/2026
Allocation of resources without limits or throttling, Integer overflow or wraparound, Heap-based buffer overflow vulnerability in Apache Thrift.
This issue affects Apache Thrift: before 0.25.0.
Users are recommended to upgrade to version 0.25.0, which fixes the issue.
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Analysis
by VulDB Data Team • 10/02/2026
The identified vulnerabilities within Apache Thrift prior to version 0.25.0 represent a critical convergence of resource management failures and memory safety defects that can severely compromise system integrity and availability. These issues are primarily categorized under CWE-770: Allocation of Resources Without Limits or Throttling, which indicates that the service fails to properly restrict the consumption of computational resources such as CPU time, memory, or network bandwidth during request processing. When an attacker sends a specially crafted payload designed to trigger excessive resource allocation, it can lead to a denial-of-service condition by exhausting system resources, thereby preventing legitimate users from accessing services hosted on the affected infrastructure. This type of vulnerability is frequently exploited in conjunction with other flaws to create more complex attack chains that bypass standard rate-limiting or input validation mechanisms.
Complementing the resource exhaustion issue are severe memory safety vulnerabilities classified under CWE-190: Integer Overflow or Wraparound and CWE-122: Heap-based Buffer Overflows. The integer overflow vulnerability arises when arithmetic operations involving data sizes or buffer lengths exceed the maximum value representable by the variable type, causing a wraparound to a small positive number rather than an error state. In the context of Apache Thrift's serialization and deserialization processes, this miscalculation can lead the application to allocate insufficient memory for incoming data structures. Subsequently, when the system attempts to write the actual payload into this undersized buffer allocated on the heap, it results in a heap-based buffer overflow as described by CWE-122. This specific flaw allows an attacker to overwrite adjacent memory regions, potentially corrupting critical application state or control flow data such as function return addresses and exception handlers stored within the process's virtual address space.
The operational impact of these combined vulnerabilities is profound, extending beyond simple service disruption to potential remote code execution. An adversary leveraging the heap-based buffer overflow can achieve arbitrary read and write capabilities within the context of the Thrift server process. This capability enables the extraction of sensitive information from memory, such as authentication tokens or cryptographic keys, and facilitates the injection and execution of malicious shellcode on the underlying host system. The presence of integer overflows further exacerbates this risk by allowing attackers to manipulate buffer boundaries in ways that evade standard bounds-checking logic, making exploitation more reliable across different platform architectures and compiler optimizations. Such vulnerabilities are often mapped to MITRE ATT&CK techniques including T1059: Command and Scripting Interpreter for initial access via remote code execution, or T1498: Network Denial of Service if the primary goal is resource exhaustion through unthrottled allocation.
To mitigate these risks, organizations running Apache Thrift must prioritize immediate upgrading to version 0.25.0 or later, where these specific memory management and input validation flaws have been addressed by the development team. In addition to software updates, defensive measures should include deploying web application firewalls configured to detect anomalous request sizes that may indicate buffer overflow attempts, as well as implementing strict rate-limiting policies at the network perimeter to mitigate resource exhaustion attacks. Furthermore, enabling heap protection mechanisms such as Address Space Layout Randomization and stack canaries on operating systems where Thrift services are deployed adds a layer of defense-in-depth by making exploitation of memory corruption vulnerabilities significantly more difficult for attackers seeking to achieve code execution.