CVE-2026-84374

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 54% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

Laravel Excel provides supercharged Excel exports and imports in Laravel. From 3.1.8 until 3.1.70, in src/Files/Disk.php the Maatwebsite\Excel\Files\Disk::copy() method resolves the caller-controlled $destination supplied through Excel::store(), $export->store(), or storeExcel() against the process working directory with realpath() instead of the configured filesystem disk. If the path names an existing writable file, Disk::copy() opens it with fopen() in rb+ mode and uses stream_copy_to_stream(), bypassing Flysystem path confinement and allowing an attacker whose application input controls the export path to overwrite arbitrary existing files with export content. The rb+ behavior creates a non-truncating overwrite and trailing bytes when the new export is shorter, and overwriting an executable PHP file can lead to remote code execution. This issue is fixed in version 3.1.70.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Sep 1, 2026
Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

3.1.70

Patch available: SpartnerNL/Laravel-Excel 3.1.70

https://github.com/SpartnerNL/Laravel-Excel/releases/tag/3.1.70
github_commit Patch Available

commit b5cafdfcf7ec (SpartnerNL/Laravel-Excel)

Patch available: SpartnerNL/Laravel-Excel 3.1.70 (contains commit b5cafdfcf7ec)

https://github.com/SpartnerNL/Laravel-Excel/commit/b5cafdfcf7ec63924e83303763be8fcae340f70b
github Patch Available

Laravel Excel writes exports outside the configured filesystem disk when given a caller-controlled path · Advisory · SpartnerNL/Laravel-Excel · GitHub

https://github.com/SpartnerNL/Laravel-Excel/security/advisories/GHSA-c7r6-vx3h-w5g2

Vendor Advisories for CVE-2026-84374(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
maatwebsite/excel3.1.10 ... 3.1.9 (62 versions)3.1.70—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 34× 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.

  1. 2026-09-19 02:38 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 01:49 UTCEG score recompute
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-17 01:16 UTCEG score recompute
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 12:59 UTCEG score recompute
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 12:22 UTCEG score recompute
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-13 23:30 UTCEG score recompute
  13. 2026-09-12 22:57 UTCEG score recompute
  14. 2026-09-11 22:23 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 10:04 UTCEG score recompute
  18. 2026-09-10 21:47 UTCEG score recompute
  19. 2026-09-08 23:18 UTCEG score recompute
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-07 17:19 UTCEG score recompute
  22. 2026-09-06 16:46 UTCEG score recompute
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-05 16:12 UTCEG score recompute
  25. 2026-09-05 15:31 UTCEPSS rescore
Show 9 more
  1. 2026-09-04 15:40 UTCEG score recompute
  2. 2026-09-04 05:07 UTCEPSS rescore
  3. 2026-09-04 03:23 UTCEG score recompute
  4. 2026-09-04 02:34 UTCEG score recompute
  5. 2026-09-02 22:54 UTCEG score recompute
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 22:19 UTCEG score recompute
  8. 2026-09-01 21:33 UTCEG score recompute
  9. 2026-09-01 21:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84374?
CVE-2026-84374 is a high vulnerability published on September 1, 2026. Laravel Excel provides supercharged Excel exports and imports in Laravel. From 3.1.8 until 3.1.70, in src/Files/Disk.php the Maatwebsite\Excel\Files\Disk::copy() method resolves the caller-controlled $destination supplied through Excel::store(), $export->store(), or storeExcel() against the process…
When was CVE-2026-84374 disclosed?
CVE-2026-84374 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84374 actively exploited?
CVE-2026-84374 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84374?
CVE-2026-84374 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-84374?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84374, 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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