{"id":"CVE-2026-107224","title":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets","summary":"Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, a Zip64 uncompressed size with the high bit set is converted from uint64 to a negative int64 before signed size-limit checks an…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-190","CWE-681"],"vendor":"xuri","product":"github.com/xuri/excelize/v2","affected":["github.com/xuri/excelize/v2 >= 2.1.0, < 2.11.1-0.20260805032953-db93f8d89de7"],"patched":["github.com/xuri/excelize/v2 2.11.1-0.20260805032953-db93f8d89de7"],"published":"2026-10-07","updated":"2026-10-07","sourceUpdated":"2026-10-07T20:17:11.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107224","references":[{"url":"https://github.com/qax-os/excelize/commit/db93f8d89de71589069a54d1b998af02e3c5f7cd","label":"security-advisories@github.com"},{"url":"https://github.com/qax-os/excelize/pull/2369","label":"security-advisories@github.com"},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw","label":"security-advisories@github.com"},{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-fw94-4wwp-w8pw"}],"tags":["nvd","ghsa","go","cve.org","exploit-available"],"aliases":["GHSA-fw94-4wwp-w8pw"],"ecosystem":"go","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-07T19:29:38.692124Z"},"ingestedAt":"2026-10-07T20:46:46.977Z","slug":"CVE-2026-107224","body":"## Overview\n\nExcelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, a Zip64 uncompressed size with the high bit set is converted from uint64 to a negative int64 before signed size-limit checks and allocation. ReadZipReader obtains UncompressedSize64 through FileInfo.Size and passes the wrapped negative value to readFile. When a crafted Zip64 entry declares an uncompressed size from 2^63 through 2^64-1 and the workbook is opened, the negative size bypasses unzip limits and reaches make as a negative capacity, allowing an attacker to panic during workbook opening. No fixed version is available as of this review.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-107224)\n\nAffected packages:\n\n- `github.com/xuri/excelize/v2 >= 2.1.0, < 2.11.1-0.20260805032953-db93f8d89de7`\n\nPatched in:\n\n- `github.com/xuri/excelize/v2 2.11.1-0.20260805032953-db93f8d89de7`\n\nSource: https://github.com/advisories/GHSA-fw94-4wwp-w8pw","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}