CVE-2026-84374 SpartnerNL CVE debrief

Who should care

Developers and administrators using Laravel Excel in their applications should be aware of this vulnerability and take immediate action to patch their installations. The vulnerability's high CVSS score of 7.5 indicates a significant risk, especially in environments where Excel exports and imports are used extensively. Additionally, security teams and vulnerability management teams should prioritize patching and review their asset inventory to identify potential exposure.

Technical summary

The Laravel Excel package from version 3.1.8 to 3.1.69 is vulnerable to a path traversal issue. The Maatwebsite/Excel/Files/Disk::copy() method resolves the $destination parameter against the process working directory instead of the configured filesystem disk. This allows an attacker to overwrite arbitrary existing files with export content, potentially leading to remote code execution if an executable PHP file is targeted. The vulnerability is fixed in version 3.1.70, and users should update to this version or later to mitigate the risk.

Defensive priority

Organizations using Laravel Excel should prioritize patching to prevent potential remote code execution.

Recommended defensive actions

• Apply the patch by updating Laravel Excel to version 3.1.70 or later.
• Review and restrict write access to the filesystem.
• Monitor for suspicious activity related to Excel exports and imports.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE-2026-84374 issue exists in Laravel Excel from version 3.1.8 to 3.1.69. The Maatwebsite/Excel/Files/Disk::copy() method does not properly confine paths, allowing attackers to overwrite arbitrary files. This can lead to remote code execution if an executable PHP file is overwritten. Evidence of this vulnerability is limited, and defenders should verify the patching status of their Laravel Excel installations and review their file system configurations to prevent potential exploitation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.