{"schema_version":1,"title":"exceljs (npm) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in exceljs (npm): 0 in the last 7 days and 4 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-78209, was published on 24 August 2026.","url":"https://junglewise.ai/threats/technologies/exceljs","json_url":"https://junglewise.ai/threats/technologies/exceljs.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/exceljs","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":3,"all_time":5,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":4,"last_365_days":4},"latest":[{"cve":"CVE-2026-78209","cvss":8.2,"epss":0.0041,"slug":"cve-2026-78209-exceljs-formula-injection-in-csv-output","title":"exceljs formula injection in CSV output","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:58.423+00:00","url":"https://junglewise.ai/threats/cve-2026-78209-exceljs-formula-injection-in-csv-output"},{"cve":"CVE-2026-78208","cvss":7.5,"epss":0.0051,"slug":"cve-2026-78208-exceljs-path-traversal-in-workbook-addimage","title":"exceljs path traversal in Workbook.addImage()","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:58.28+00:00","url":"https://junglewise.ai/threats/cve-2026-78208-exceljs-path-traversal-in-workbook-addimage"},{"cve":"CVE-2026-78207","cvss":9.4,"epss":0.006,"slug":"cve-2026-78207-exceljs-prototype-pollution-in-deepmerge-helper","title":"exceljs prototype pollution in deepMerge helper","severity":"critical","exploited":false,"published_at":"2026-08-24T01:16:58.137+00:00","url":"https://junglewise.ai/threats/cve-2026-78207-exceljs-prototype-pollution-in-deepmerge-helper"},{"cve":"CVE-2026-78206","cvss":7.5,"epss":0.0063,"slug":"cve-2026-78206-exceljs-zip-bomb-denial-of-service","title":"exceljs zip bomb denial of service","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:57.973+00:00","url":"https://junglewise.ai/threats/cve-2026-78206-exceljs-zip-bomb-denial-of-service"},{"cve":"CVE-2018-16459","cvss":3,"slug":"cve-2018-16459-exceljs-cross-site-scripting-in-xlsx-cell-parsing","title":"exceljs Cross-Site Scripting in XLSX cell parsing","severity":"low","exploited":false,"published_at":"2018-09-11T18:58:40+00:00","url":"https://junglewise.ai/threats/cve-2018-16459-exceljs-cross-site-scripting-in-xlsx-cell-parsing"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":1,"exploited":0,"vulnerabilities":4},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"flowise (npm)","slug":"flowise","vulnerabilities":156,"url":"https://junglewise.ai/threats/technologies/flowise"},{"name":"vm2 (npm)","slug":"vm2","vulnerabilities":82,"url":"https://junglewise.ai/threats/technologies/vm2"},{"name":"@budibase/server (npm)","slug":"budibase-server","vulnerabilities":61,"url":"https://junglewise.ai/threats/technologies/budibase-server"},{"name":"directus (npm)","slug":"directus","vulnerabilities":60,"url":"https://junglewise.ai/threats/technologies/directus"},{"name":"nocodb (npm)","slug":"nocodb","vulnerabilities":55,"url":"https://junglewise.ai/threats/technologies/nocodb"},{"name":"hono (npm)","slug":"hono","vulnerabilities":54,"url":"https://junglewise.ai/threats/technologies/hono"},{"name":"parse-server (npm)","slug":"parse-server","vulnerabilities":42,"url":"https://junglewise.ai/threats/technologies/parse-server"},{"name":"dompurify (npm)","slug":"dompurify","vulnerabilities":39,"url":"https://junglewise.ai/threats/technologies/dompurify"},{"name":"ghost (npm)","slug":"ghost","vulnerabilities":39,"url":"https://junglewise.ai/threats/technologies/ghost"},{"name":"flowise-components (npm)","slug":"flowise-components","vulnerabilities":35,"url":"https://junglewise.ai/threats/technologies/flowise-components"},{"name":"astro (npm)","slug":"astro","vulnerabilities":30,"url":"https://junglewise.ai/threats/technologies/astro"},{"name":"@anthropic-ai/claude-code (npm)","slug":"anthropic-ai-claude-code","vulnerabilities":28,"url":"https://junglewise.ai/threats/technologies/anthropic-ai-claude-code"}],"technology":{"hub":true,"name":"exceljs (npm)","slug":"exceljs","vendor":{"name":"npm","slug":"npm","url":"https://junglewise.ai/threats/vendors/npm"},"aliases":[],"homepage":"https://www.npmjs.com/package/exceljs","repo_url":"https://github.com/exceljs/exceljs","description":"A Node.js library for reading, manipulating, and writing Excel spreadsheets in XLSX and CSV formats.","url":"https://junglewise.ai/threats/technologies/exceljs"},"most_severe":[{"cve":"CVE-2026-78207","cvss":9.4,"epss":0.006,"slug":"cve-2026-78207-exceljs-prototype-pollution-in-deepmerge-helper","title":"exceljs prototype pollution in deepMerge helper","severity":"critical","exploited":false,"published_at":"2026-08-24T01:16:58.137+00:00","url":"https://junglewise.ai/threats/cve-2026-78207-exceljs-prototype-pollution-in-deepmerge-helper"},{"cve":"CVE-2026-78209","cvss":8.2,"epss":0.0041,"slug":"cve-2026-78209-exceljs-formula-injection-in-csv-output","title":"exceljs formula injection in CSV output","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:58.423+00:00","url":"https://junglewise.ai/threats/cve-2026-78209-exceljs-formula-injection-in-csv-output"},{"cve":"CVE-2026-78206","cvss":7.5,"epss":0.0063,"slug":"cve-2026-78206-exceljs-zip-bomb-denial-of-service","title":"exceljs zip bomb denial of service","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:57.973+00:00","url":"https://junglewise.ai/threats/cve-2026-78206-exceljs-zip-bomb-denial-of-service"},{"cve":"CVE-2026-78208","cvss":7.5,"epss":0.0051,"slug":"cve-2026-78208-exceljs-path-traversal-in-workbook-addimage","title":"exceljs path traversal in Workbook.addImage()","severity":"high","exploited":false,"published_at":"2026-08-24T01:16:58.28+00:00","url":"https://junglewise.ai/threats/cve-2026-78208-exceljs-path-traversal-in-workbook-addimage"},{"cve":"CVE-2018-16459","cvss":3,"slug":"cve-2018-16459-exceljs-cross-site-scripting-in-xlsx-cell-parsing","title":"exceljs Cross-Site Scripting in XLSX cell parsing","severity":"low","exploited":false,"published_at":"2018-09-11T18:58:40+00:00","url":"https://junglewise.ai/threats/cve-2018-16459-exceljs-cross-site-scripting-in-xlsx-cell-parsing"}],"generated_at":"2026-09-26T10:14:00.201383+00:00"}