{"id":"CVE-2026-115906","state":"PUBLISHED","title":"zip: AES Entry HMAC Authentication Bypass on Premature EOF","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.","publishedAt":"2026-10-26T16:30:30.954Z","updatedAt":"2026-10-26T16:30:30.954Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["zip-rs zip2"],"affected":[{"vendor":"zip-rs","product":"zip2","versions":[{"version":">= 0.6.0, < 9.0.0","status":"affected"}]}],"references":["https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4","https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216","https://github.com/zip-rs/zip2/releases/tag/v9.0.0"],"weaknesses":["CWE-354","CWE-1284"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/115xxx/CVE-2026-115906.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115906","state":"PUBLISHED","datePublished":"2026-10-26T16:30:30.954Z","dateUpdated":"2026-10-26T16:30:30.954Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-23T20:21:45.106Z"},"containers":{"cna":{"title":"zip: AES Entry HMAC Authentication Bypass on Premature EOF","descriptions":[{"lang":"en","value":"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":[{"vendor":"zip-rs","product":"zip2","versions":[{"version":">= 0.6.0, < 9.0.0","status":"affected"}]}],"references":[{"url":"https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4","name":"https://github.com/zip-rs/zip2/security/advisories/GHSA-8hxf-qr8p-62x4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216","name":"https://github.com/zip-rs/zip2/commit/ec265db0b0602f8ffb9479327397bddefb7e2216","tags":["x_refsource_MISC"]},{"url":"https://github.com/zip-rs/zip2/releases/tag/v9.0.0","name":"https://github.com/zip-rs/zip2/releases/tag/v9.0.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-354","lang":"en","description":"CWE-354: Improper Validation of Integrity Check Value","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1284","lang":"en","description":"CWE-1284: Improper Validation of Specified Quantity in Input","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-26T16:30:30.954Z"},"source":{"advisory":"GHSA-8hxf-qr8p-62x4","discovery":"UNKNOWN"}}}}}