What’s Vulnerable › Vulnerabilities

CVE-2026-115906: zip: AES Entry HMAC Authentication Bypass on Premature EOF

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-31
• Weakness: CWE-354

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.

Affected products

• zip-rs zip2: from 0.6.0, < 9.0.0

References

• 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
• https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4

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