CVE-2026-115906 zip: AES Entry HMAC Authentication Bypass on Premature EOF
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-115906?
CVE-2026-115906 is a medium-severity vulnerability in zip-rs zip2, published on 26 Oct 2026.
Official description
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.
Which versions are affected by CVE-2026-115906?
2 open source packages ship an affected version, including zip.
| Package | Affected | Fixed in |
|---|---|---|
zip crates.io | From 0.6.0 | 9.0.0 |
zip crates.io | From 0.6.0 | 9.0.0 |
How do I fix CVE-2026-115906?
Upgrade zip to 9.0.0 or later.
Is CVE-2026-115906 being exploited?
There is no known exploitation of CVE-2026-115906 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-115906, GHSA-8hxf-qr8p-62x4, UBUNTU-CVE-2026-115906.