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CVE-2026-115907— zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size

Quick assessment

Affected
zip-rs zip2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

是 Rust 语言中用于读写简单 ZIP 文件的库。在版本 5.1.0 至 9.0.0 期间，若应用启用了 特性，则可能在验证压缩流之前，根据攻击者控制的 ZIP64 未压缩大小来预留输出容量。 中的 路径在调用 时，可能因容量溢出而引发 panic；同时， 和 解码器也存在相同的无界预分配问题。未处理的 panic 可能导致档案处理服务终止。该问题已在版本 9.0.0 中修复。

CVSS 7.5 · High
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I. Basic Information for CVE-2026-115907

Vulnerability Information
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Vulnerability Title
zip: legacy Shrink/Reduce/Implode decoder: denial of service from attacker-controlled ZIP64 uncompressed size
Source: CVE Program / CVE List V5
Vulnerability Description
zip is a zip library for Rust that supports reading and writing simple ZIP files. From 5.1.0 until 9.0.0, applications built with the legacy-zip feature can reserve output capacity from an attacker-controlled ZIP64 uncompressed size before validating the compressed stream. The ShrinkDecoder path in src/legacy/shrink.rs can panic with a capacity overflow during ZipArchive::extract, and the Reduce and Implode decoders contain the same unbounded preallocation pattern. An unhandled panic can terminate an archive-processing service. This issue is fixed in version 9.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zip-rs zip2 >= 5.1.0, < 9.0.0 -

II. Public POCs for CVE-2026-115907

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III. Intelligence Information for CVE-2026-115907

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Patches & Fixes for CVE-2026-115907 (2)

Vendor Advisories for CVE-2026-115907 (1)

Same Patch Batch · zip-rs · 2026-10-26 · 5 CVEs total

CVE-2026-115905 10.0 CRITICAL zip: Critical Parser Differential & Security Control Bypass via Dual-Header Inconsistencie
CVE-2026-115909 7.5 HIGH zip: Unbounded Symlink-Target Handling Can Abort Or Exhaust Memory During Extraction
CVE-2026-115908 7.4 HIGH zip: Arbitrary file write outside the extraction directory, because ZipArchive::extract va
CVE-2026-115906 6.5 MEDIUM zip: AES Entry HMAC Authentication Bypass on Premature EOF

IV. Related Vulnerabilities

Same product: zip2
Same vendor: zip-rs
Same weakness: CWE-400