CVE-2026-78208

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-24. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 it in the generated workbook.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 31, 2026

Advisory Details (5)

Auto-updated Aug 24, 2026
Patch available. Sources: github.
generic

exceljs through 4.4.0 Path Traversal via Unvalidated addImage filename | Advisories | VulnCheck

https://www.vulncheck.com/advisories/exceljs-through-path-traversal-via-unvalidated-addimage-filename
generic

exceljs/lib/xlsx/xlsx.js at v4.4.0 · exceljs/exceljs · GitHub

https://github.com/exceljs/exceljs/blob/v4.4.0/lib/xlsx/xlsx.js#L421-L429
generic

exceljs/lib/doc/workbook.js at v4.4.0 · exceljs/exceljs · GitHub

https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/workbook.js#L142-L147
github Patch Available

Path Traversal in exceljs via `Workbook.addImage({filename})` · Advisory · mateocallec/exceljs-hardened · GitHub

https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-m8mg-8574-gm3m
generic

GitHub - exceljs/exceljs: Excel Workbook Manager · GitHub

https://github.com/exceljs/exceljs

Vendor Advisories for CVE-2026-78208(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 115× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 115 total refreshes for this CVE.

  1. 2026-09-19 21:15 UTCEG score recompute
  2. 2026-09-19 21:15 UTCGHSA enrichment
  3. 2026-09-19 10:08 UTCGHSA enrichment
  4. 2026-09-18 22:31 UTCEG score recompute
  5. 2026-09-18 22:31 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 11:24 UTCGHSA enrichment
  8. 2026-09-18 00:16 UTCEG score recompute
  9. 2026-09-18 00:16 UTCGHSA enrichment
  10. 2026-09-17 13:08 UTCGHSA enrichment
  11. 2026-09-17 01:24 UTCGHSA enrichment
  12. 2026-09-16 14:17 UTCEG score recompute
  13. 2026-09-16 14:17 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 02:20 UTCGHSA enrichment
  17. 2026-09-15 15:12 UTCGHSA enrichment
  18. 2026-09-15 04:01 UTCEG score recompute
  19. 2026-09-15 04:01 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 16:52 UTCGHSA enrichment
  23. 2026-09-14 05:45 UTCGHSA enrichment
  24. 2026-09-13 18:37 UTCEG score recompute
  25. 2026-09-13 18:37 UTCGHSA enrichment
Show 75 more
  1. 2026-09-13 07:29 UTCGHSA enrichment
  2. 2026-09-12 20:22 UTCEG score recompute
  3. 2026-09-12 20:22 UTCGHSA enrichment
  4. 2026-09-12 09:14 UTCGHSA enrichment
  5. 2026-09-11 22:07 UTCEG score recompute
  6. 2026-09-11 22:07 UTCGHSA enrichment
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 10:59 UTCEG score recompute
  10. 2026-09-11 10:59 UTCGHSA enrichment
  11. 2026-09-10 23:18 UTCGHSA enrichment
  12. 2026-09-10 12:11 UTCEG score recompute
  13. 2026-09-10 12:10 UTCGHSA enrichment
  14. 2026-09-10 09:35 UTCEPSS rescore
  15. 2026-09-10 00:38 UTCGHSA enrichment
  16. 2026-09-09 12:55 UTCGHSA enrichment
  17. 2026-09-09 01:35 UTCEG score recompute
  18. 2026-09-09 01:35 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 02:33 UTCEG score recompute
  21. 2026-09-08 02:33 UTCGHSA enrichment
  22. 2026-09-07 15:24 UTCGHSA enrichment
  23. 2026-09-07 01:04 UTCGHSA enrichment
  24. 2026-09-06 13:55 UTCEG score recompute
  25. 2026-09-06 13:55 UTCGHSA enrichment
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-06 02:47 UTCGHSA enrichment
  28. 2026-09-05 15:39 UTCEG score recompute
  29. 2026-09-05 15:39 UTCGHSA enrichment
  30. 2026-09-05 04:32 UTCGHSA enrichment
  31. 2026-09-04 17:24 UTCEG score recompute
  32. 2026-09-04 17:23 UTCGHSA enrichment
  33. 2026-09-04 06:14 UTCEG score recompute
  34. 2026-09-04 06:13 UTCGHSA enrichment
  35. 2026-09-04 05:07 UTCEPSS rescore
  36. 2026-09-03 19:05 UTCGHSA enrichment
  37. 2026-09-03 07:57 UTCGHSA enrichment
  38. 2026-09-02 20:49 UTCEG score recompute
  39. 2026-09-02 20:49 UTCGHSA enrichment
  40. 2026-09-02 14:12 UTCEPSS rescore
  41. 2026-09-02 07:05 UTCGHSA enrichment
  42. 2026-09-01 19:52 UTCEG score recompute
  43. 2026-09-01 19:52 UTCGHSA enrichment
  44. 2026-09-01 13:54 UTCEPSS rescore
  45. 2026-09-01 08:10 UTCEG score recompute
  46. 2026-09-01 08:10 UTCGHSA enrichment
  47. 2026-09-01 04:40 UTCEPSS rescore
  48. 2026-09-01 04:40 UTCEPSS rescore
  49. 2026-08-31 20:56 UTCGHSA enrichment
  50. 2026-08-31 20:04 UTCGHSA enrichment
  51. 2026-08-31 08:56 UTCGHSA enrichment
  52. 2026-08-30 21:46 UTCEG score recompute
  53. 2026-08-30 21:46 UTCGHSA enrichment
  54. 2026-08-30 19:18 UTCEPSS rescore
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 10:39 UTCEG score recompute
  57. 2026-08-30 10:39 UTCGHSA enrichment
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 23:31 UTCGHSA enrichment
  60. 2026-08-29 12:23 UTCEG score recompute
  61. 2026-08-29 12:23 UTCGHSA enrichment
  62. 2026-08-29 12:03 UTCEG score recompute
  63. 2026-08-29 12:03 UTCGHSA enrichment
  64. 2026-08-29 01:05 UTCEG score recompute
  65. 2026-08-29 01:04 UTCGHSA enrichment
  66. 2026-08-28 21:42 UTCEPSS rescore
  67. 2026-08-28 13:55 UTCGHSA enrichment
  68. 2026-08-28 02:47 UTCGHSA enrichment
  69. 2026-08-27 15:40 UTCEG score recompute
  70. 2026-08-27 15:40 UTCGHSA enrichment
  71. 2026-08-27 14:25 UTCEPSS rescore
  72. 2026-08-27 04:32 UTCGHSA enrichment
  73. 2026-08-26 17:24 UTCEG score recompute
  74. 2026-08-26 17:24 UTCGHSA enrichment
  75. 2026-08-26 16:23 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-78208?
CVE-2026-78208 is a high vulnerability published on August 24, 2026. 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 it in the generated workbook.
When was CVE-2026-78208 disclosed?
CVE-2026-78208 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78208 actively exploited?
CVE-2026-78208 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.9% of all scored CVEs.
What is the CVSS score of CVE-2026-78208?
CVE-2026-78208 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-78208?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78208, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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