zip-rs zip2 up to 8.x Shrink Decoder src/legacy/shrink.rs ZipArchive::extract allocation of resources

Summaryinfo

A vulnerability described as problematic has been identified in zip-rs zip2 up to 8.x. Affected by this vulnerability is the function ZipArchive::extract of the file src/legacy/shrink.rs of the component Shrink Decoder. Such manipulation leads to allocation of resources. This vulnerability is documented as CVE-2026-115907. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in zip-rs zip2 up to 8.x. It has been rated as problematic. Affected by this issue is the function ZipArchive::extract of the file src/legacy/shrink.rs of the component Shrink Decoder. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-115907 since 10/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 9.0.0 eliminates this vulnerability.

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Productinfo

Vendor

• zip-rs

Name

• zip2

Version

• 8.x

Website

• Product: https://github.com/zip-rs/zip2/

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