{"schemaVersion":3,"id":"CVE-2026-107224","aliases":["GHSA-fw94-4wwp-w8pw"],"status":"published","duplicateOf":null,"title":null,"description":"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 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.","dates":{"published":"2026-10-07T18:53:27.282Z","modified":"2026-10-07T19:30:13.733Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00306,"percentile":0.22025,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-08T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00306,"percentile":0.22025}],"last30":[{"date":"2026-10-08T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00356,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00306,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00306,"percentile":0.22025}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_QAX-OS_EXCELIZE","name":"Excelize","source":"github","url":"https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-190","name":"Integer Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"},{"id":"CWE-681","name":"Incorrect Conversion between Numeric Types","description":"When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/681.html"}],"affected":[{"vendor":"excelize","product":"excelize","name":"excelize","label":"excelize","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.1.0, ≤ 2.11.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.1.0, ≤ 2.11.0","eol":null,"hubHref":"/vendor/excelize/excelize"},{"vendor":"github.com/xuri/excelize","product":"v2","name":"github.com/xuri/excelize/v2","label":"v2","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/xuri/excelize/v2","purlType":"golang","versions":[{"text":"≥ 2.1.0, < 2.11.1-0.20260805032953-db93f8d89de7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.1.0, < 2.11.1-0.20260805032953-db93f8d89de7","eol":null,"hubHref":null},{"vendor":"qax-os","product":"excelize","name":"excelize","label":"excelize","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.1.0, ≤ 2.11.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.1.0, ≤ 2.11.0","eol":null,"hubHref":"/vendor/qax-os/excelize"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw","label":"github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Exploit","Vendor Advisory"]},{"url":"https://github.com/qax-os/excelize/pull/2369","label":"github.com/qax-os/excelize/pull/2369","hostname":"github.com","tags":["X Refsource MISC","WEB","Issue Tracking","Patch"]},{"url":"https://github.com/qax-os/excelize/commit/db93f8d89de71589069a54d1b998af02e3c5f7cd","label":"github.com/qax-os/excelize/commit/db93f8d89de71589069a54d1b998af02e3c5f7cd","hostname":"github.com","tags":["X Refsource MISC","WEB","Patch"]},{"url":"https://github.com/qax-os/excelize","label":"github.com/qax-os/excelize","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-07T18:53:27.282Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-07T19:30:13.733Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":36,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:07:40.933Z","stale":false,"partial":false}}