{"id":"CVE-2026-128344","aliases":[],"cve":{"records":[{"id":"CVE-2026-128344","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-13T01:20:42.495Z","published":"2026-11-13T09:33:33.044Z","modified":"2026-11-13T17:55:08.423Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-13T09:33:33.044Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-13T17:55:08.423Z"}],"references":[{"url":"https://github.com/exceljs/exceljs","tags":["product"],"source":"VulnCheck"},{"url":"https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-cqmf-h7c5-g7xx","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/anchor.js#L40-L64","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/worksheet.js#L243-L261","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/exceljs-through-4.4.0-memory-exhaustion-via-oversized-image-anchor-column","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-cqmf-h7c5-g7xx","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-770","description":"Allocation of Resources Without Limits or Throttling","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:exceljs_project:exceljs:*:*:*:*:*:*:*:*","versionEndIncluding":"4.4.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-13T17:54:29.159157Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"ExcelJS through 4.4.0 Memory Exhaustion via Oversized Image Anchor Column","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"ExcelJS through 4.4.0 contains a memory exhaustion vulnerability that allows attackers to crash applications by supplying a workbook with an unbounded image anchor column in the drawing part. Attackers can set an anchor column such as 300000000 in xl/drawings/drawing1.xml so reading getImages() anchor positions makes Worksheet.getColumn allocate millions of Column objects and abort with a heap out-of-memory error.","score":8.7,"severity":"high","published":"2026-11-13T09:33:33.044Z","modified":"2026-11-13T17:55:08.423Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"exceljs","name":"exceljs","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.4.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:npm/exceljs","packageIdentity":{"ecosystem":"npm","name":"exceljs"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-128344"}],"remediation":[],"references":["https://github.com/exceljs/exceljs","https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-cqmf-h7c5-g7xx","https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/anchor.js#L40-L64","https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/worksheet.js#L243-L261","https://www.vulncheck.com/advisories/exceljs-through-4.4.0-memory-exhaustion-via-oversized-image-anchor-column"],"sources":[{"name":"CVE","id":"CVE-2026-128344","modified":"2026-11-13T17:55:08.423Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-128344"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"sourceAffected":[],"observedAt":"2026-11-13T17:58:16.069Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T04:05:32.009Z"},"coverage":[{"source":"NVD","status":"refresh-failed","attemptedAt":"2026-11-13T18:00:31.264Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-13T18:00:31.262Z","attemptedAt":"2026-11-13T18:00:31.262Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-13T18:00:31.258Z","attemptedAt":"2026-11-13T18:00:31.258Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-13T18:00:30.697Z","attemptedAt":"2026-11-13T18:00:30.697Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-128344","url":"https://www.first.org/epss/","probability":0.0063,"percentile":0.50744,"date":"2026-11-13","checkedAt":"2026-11-13T18:00:30.697Z"},{"source":"GitHub Advisory Database","id":"GHSA-5cr4-rg98-rm82","url":"https://github.com/advisories/GHSA-5cr4-rg98-rm82","modified":"2026-11-13T12:31:48Z","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-13T18:00:31.262Z"},{"source":"ENISA EUVD","id":"EUVD-2026-125155","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-125155","modified":"Nov 13, 2026, 9:33:33 AM","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","checkedAt":"2026-11-13T18:00:31.258Z"}],"aiSummary":{"text":"ExcelJS through 4.4.0 has a memory exhaustion vulnerability via oversized image anchor columns, allowing attackers to crash applications. Attackers can trigger this by setting a large anchor column. This causes the application to allocate excessive resources, leading to a heap out-of-memory error.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T18:01:04.768Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-128344"}]}}