CVE-2026-115906

zip is a zip library for Rust that supports reading and writing simple ZIP files. From 0.6.0 until 9.0.0, the AES entry reader in src/aes.rs verifies its HMAC only when the attacker-controlled data counter reaches zero. If the underlying bounded reader reaches the real end of the archive while data_remaining is still positive, or if an encrypted entry has no payload, the reader can return a clean end of stream without reading and comparing the authentication tag. Applications using by_index_decrypt, by_name_decrypt, by_path_decrypt, or password-enabled by_index_with_options can therefore accept modified plaintext without an authentication error. This issue is fixed in version 9.0.0.

• CWE-354
• CWE-1284

• https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216
• https://github.com/zip-rs/zip2/releases/tag/v9.0.0
• https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4

Published

Oct 26, 2026

Last Modified

Oct 26, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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