CVE-2026-55969 in Thrift
Summary
by MITRE • 07/27/2026
Integer Overflow or Wraparound vulnerability in Apache Thrift C++, c_glib, Go, netstd, Delphi and Haxe bindings.
This issue affects Apache Thrift: before 0.24.0.
Users are recommended to upgrade to version 0.24.0, which fixes the issue.
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Analysis
by VulDB Data Team • 07/27/2026
The integer overflow or wraparound vulnerability in Apache Thrift bindings represents a critical security flaw that impacts multiple programming language implementations including C++, c_glib, Go, netstd, Delphi, and Haxe. This vulnerability stems from improper handling of integer arithmetic operations within the serialization and deserialization processes of the Apache Thrift framework. The flaw occurs when the system attempts to perform arithmetic operations on integers that exceed their maximum representable values, causing the integers to wrap around to minimum values or zero, potentially leading to unexpected behavior and security consequences.
The technical nature of this vulnerability aligns with CWE-190, which specifically addresses integer overflow conditions where an integer value exceeds the maximum value that can be represented by its data type. In Apache Thrift's context, this typically manifests during buffer allocation calculations, message size validations, or length fields processing within various protocol implementations. When maliciously crafted data is processed through these vulnerable bindings, attackers can manipulate integer values to cause unintended memory allocations or buffer overflows that may result in denial of service conditions or potentially arbitrary code execution.
The operational impact of this vulnerability extends across multiple development environments and deployment scenarios where Apache Thrift is utilized for inter-service communication. Systems relying on these affected language bindings for data serialization and network protocols become susceptible to attacks that exploit the integer wraparound behavior. The vulnerability affects not just individual applications but entire ecosystems that depend on consistent and secure data handling mechanisms provided by the Thrift framework, making it particularly concerning for distributed systems architectures where multiple services communicate through Thrift interfaces.
The remediation strategy focuses on upgrading to Apache Thrift version 0.24.0 or later, which incorporates fixes addressing the specific integer overflow conditions in the affected language bindings. Organizations should prioritize this upgrade across all systems utilizing vulnerable Thrift implementations to eliminate the risk of exploitation. Additionally, security teams should conduct comprehensive assessments of their service architectures to identify any custom implementations or third-party components that may be indirectly affected by this vulnerability through dependencies on vulnerable Thrift versions. This vulnerability also aligns with ATT&CK technique T1203, which covers the exploitation of implementation flaws in software libraries and frameworks, emphasizing the importance of maintaining up-to-date dependencies as part of comprehensive security hygiene practices.
Security professionals should implement monitoring solutions to detect potential exploitation attempts targeting this vulnerability through anomalous integer operations or memory allocation patterns. The fix implemented in version 0.24.0 likely includes proper input validation, overflow checking mechanisms, and enhanced boundary conditions for integer calculations within the protocol handling components. Organizations maintaining legacy systems should consider implementing additional defensive measures such as network segmentation, access controls, and runtime monitoring to mitigate potential risks while planning for full system upgrades.