CVE-2026-115905: zip: Critical Parser Differential & Security Control Bypass via Dual-Header Inconsistencies (Zip Cloaking) Leading to Arbitrary File Overwrite & RCE

October 28, 2026

A critical architectural parser differential exists in the zip crate (<= 9.0.4) between random-access archive readers (ZipArchive) and streaming readers (ZipStreamReader). ZipArchive considers the Central Directory File Header (CDFH) authoritative and ignores the filename declared in the Local File Header (LFH). In contrast, ZipStreamReader relies exclusively on the Local File Header (LFH) when extracting files to the filesystem.

This discrepancy enables ZIP archives to appear to have different file paths and contents according to which tool is reading them.

References

Code Behaviors & Features

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