{"id":"CVE-2026-115906","title":"zip: AES Entry HMAC Authentication Bypass on Premature EOF","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-354","CWE-1284"],"vendor":"zip-rs","product":"zip2","affected":["zip2 >= 0.6.0, < 9.0.0"],"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T16:30:30.954Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115906","references":[{"url":"https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4","label":"https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4"},{"url":"https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216","label":"https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216"},{"url":"https://github.com/zip-rs/zip2/releases/tag/v9.0.0","label":"https://github.com/zip-rs/zip2/releases/tag/v9.0.0"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T17:33:33.082Z","slug":"CVE-2026-115906","body":"## Overview\n\nzip 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.\n\n## Affected\n\n- `zip2 >= 0.6.0, < 9.0.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}