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CVE-2026-55780 is a denial-of-service vulnerability in NanaZip prior to version 6.5.1749.0. The flaw is in the .NET single-file bundle handler implemented in NanaZip.Codecs.Archive.DotNetSingleFile.cpp. During extraction, the handler sizes its buffer using the bundle entry Size field after only checking that the value is non-negative, without validating it against the actual underlying file size. A crafted bundle can therefore supply an attacker-controlled size value that triggers an excessive allocation attempt inside the Extract routine. This can result in C++ exceptions such as std::bad_alloc or std::length_error propagating across the COM STDMETHODCALLTYPE boundary and terminating the process.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
4 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.