{"id":"CVE-2026-78208","title":"exceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage() function that fails to validate file paths","summary":"exceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage() function that fails to validate file paths. Attackers can supply arbitrary file paths to read any file accessible to the Node.js process and embed i…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-73"],"published":"2026-08-24","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78208","references":[{"url":"https://github.com/exceljs/exceljs","label":"disclosure@vulncheck.com"},{"url":"https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/workbook.js#L142-L147","label":"disclosure@vulncheck.com"},{"url":"https://github.com/exceljs/exceljs/blob/v4.4.0/lib/xlsx/xlsx.js#L421-L429","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-m8mg-8574-gm3m","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/exceljs-through-path-traversal-via-unvalidated-addimage-filename","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00373,"epssPercentile":0.31158,"ingestedAt":"2026-08-29T21:42:33.239Z","slug":"CVE-2026-78208","body":"## Overview\n\nexceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage() function that fails to validate file paths. Attackers can supply arbitrary file paths to read any file accessible to the Node.js process and embed it in the generated workbook.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}