CVE-2026-115906
zip: AES Entry HMAC Authentication Bypass on Premature EOF
MEDIUM 6.5EPSS 0.2%
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.
- Affected
- zip-rs · zip2
- CVSS v3.1 GITHUB
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - EPSS
- 0.15% chance of exploitation in the next 30 days, 4th percentile
- Published
- 2026-10-26
Proof-of-concept exploits (1)
CVE references
- zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216REFERENCE
- zip-rs/zip2/releases/tag/v9.0.0REFERENCE
- zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4REFERENCE