SEPTEMBER 18, 2026
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Case File

CVE-2026-84800

HIGH · CVSS 7.1 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-02 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Craft CMS versions from 5.0.0-RC1 to 5.10.10 are vulnerable due to a missing authorization check in the AssetsController, allowing low-privilege authenticated users to overwrite files of other users within shared folders. This flaw can lead to unauthorized file modifications, potentially compromising the integrity of shared assets. Organizations using affected versions should prioritize patching to version 5.10.11 to mitigate this high-severity risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84800
Severity
HIGH
CVSS
7.1
EPSS
0.20%

Original NVD Description

Craft CMS versions >= 5.0.0-RC1 and < 5.10.11 contain a missing authorization vulnerability in AssetsController::actionReplaceFile. When a request supplies sourceAssetId and targetFilename but omits assetId, the target asset is resolved by folder and filename after the permission checks execute, so the replacePeerFiles permission is never enforced. An authenticated low-privilege author with only the replaceFiles permission on a shared folder can overwrite the content of a peer's asset file (located in the same folder) with attacker-controlled bytes. Fixed in 5.10.11.