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CVE-2026-55969 is an integer overflow or wraparound vulnerability in Apache Thrift affecting the C++, c_glib, Go, netstd, Delphi, and Haxe bindings before version 0.24.0. The flaw is located in TProtocol::checkReadBytesAvailable(), a routine involved in validating readable byte counts during protocol processing. An attacker can trigger an arithmetic overflow during size or bounds validation, causing the check to behave incorrectly and undermining intended protections around input length handling. Apache Thrift 0.24.0 fixes the issue.
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An integer overflow vulnerability in Apache Thrift prior to 0.24.0 in TProtocol::checkReadBytesAvailable().
An integer overflow vulnerability in Apache Thrift within TProtocol::checkReadBytesAvailable().
An integer overflow or wraparound vulnerability in Apache Thrift bindings, specifically involving TProtocol::checkReadBytesAvailable(), affecting versions before 0.24.0.
An integer overflow or wraparound vulnerability in Apache Thrift's C++ and c_glib bindings, specifically in TProtocol::checkReadBytesAvailable(), 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.