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CVE-2026-55971 is a heap-based buffer overflow vulnerability in the C++ bindings of Apache Thrift. The flaw is in THeaderTransport::untransform() during ZLIB-related processing and results in an out-of-bounds write on the heap. Apache Thrift versions prior to 0.24.0 are affected. Because the vulnerable code operates on transformed header transport data, a malformed or attacker-controlled input reaching this code path can corrupt heap memory and destabilize the process.
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No public exploit code observed for this vulnerability.
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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.
A critical heap-based buffer overflow vulnerability in Apache Thrift C++ bindings, specifically in THeaderTransport::untransform(), affecting 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.