Vulnerability in Zip-Rs Zip2
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Zip-Rs Zip2 — versions >= 0.6.0, < 9.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-115906?
- CVE-2026-115906 is a medium-severity vulnerability in Zip-Rs Zip2, classified under Improper Validation of Integrity Check Value. CVSS score: 6.5/10. Published 2026-10-26.
- How severe is CVE-2026-115906?
- Medium severity. CVSS v3 base score is 6.5 out of 10.