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CVE-2026-55971 is a heap-based buffer overflow vulnerability in the C++ bindings of Apache Thrift. The flaw is described as a ZLIB-related heap buffer overflow write in THeaderTransport::untransform(). It affects Apache Thrift versions prior to 0.24.0. The vulnerability arises during processing of transformed or compressed data in the affected transport handling path, where improper bounds handling can lead to a write beyond the limits of a heap-allocated buffer.
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No public exploit code observed for this vulnerability.
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A network-accessible vulnerability whose CVSS vectors indicate low attack complexity, no required privileges or user interaction, and high confidentiality, integrity, and availability impact. The content does not identify the affected product or underlying flaw. It lists a patch publication date of August 13, 2026, and states that no known exploits are available.
A heap-based buffer overflow vulnerability in Apache Thrift C++ bindings affecting Apache Thrift versions before 0.24.0.
A heap-based buffer overflow vulnerability in the Apache Thrift C++ bindings affecting Apache Thrift versions before 0.24.0.
A heap-based buffer overflow vulnerability in Apache Thrift C++ bindings involving ZLIB handling in THeaderTransport::untransform(). It affects Apache Thrift versions before 0.24.0.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.