CVE-2026-79426: CRMEB Path Traversal Vulnerability

CVE-2026-79426 Overview

CVE-2026-79426 is an arbitrary file deletion vulnerability in CRMEB v6.0.0, an open-source e-commerce platform. The flaw resides in the /adminapi/file/video_data_save component. Authenticated attackers can send a crafted POST request to delete arbitrary files on the server filesystem. The weakness is classified as [CWE-73]: External Control of File Name or Path. Successful exploitation can remove application files, configuration data, or system resources required for normal operation.

Critical Impact
Authenticated attackers can delete arbitrary files on the CRMEB server, potentially destroying application integrity, disrupting service availability, or enabling follow-on attacks by removing security-relevant files.

Affected Products

CRMEB v6.0.0
CRMEB e-commerce platform (component: /adminapi/file/video_data_save)
Deployments exposing the CRMEB admin API to authenticated users

Discovery Timeline

2026-09-04 - CVE-2026-79426 published to NVD
2026-09-09 - Last updated in NVD database

Technical Details for CVE-2026-79426

Vulnerability Analysis

The vulnerability exists in the video_data_save handler exposed under the CRMEB admin API at /adminapi/file/video_data_save. The endpoint accepts a file path parameter in a POST request without adequate validation or canonicalization. An authenticated attacker with access to the admin API can supply a crafted path that references files outside the intended directory scope. The application then performs a delete operation on the attacker-controlled path.

Because the endpoint requires authentication, the attack requires valid admin-context credentials or an active session. The impact spans confidentiality, integrity, and availability: removed files can include application source, uploaded media, log evidence, or configuration required to run the platform. Refer to the GitHub Security Advisory CVE-2026-79426 for full technical context.

Root Cause

The root cause is external control of a file name or path passed to a filesystem delete operation. The video_data_save component trusts a user-supplied path value and does not enforce a strict allow-list, canonical path check, or containment within the expected upload directory. Path traversal sequences and absolute paths are therefore treated as valid delete targets.

Attack Vector

An authenticated attacker sends a POST request to /adminapi/file/video_data_save with a manipulated path parameter. The parameter references files outside the intended video data directory using traversal sequences or absolute paths. The server resolves the path and deletes the target file. See the CRMEB source repository for the affected component code.

No public proof-of-concept exploit is listed in the enriched CVE data, and the vulnerability is not present in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-79426

Indicators of Compromise

POST requests to /adminapi/file/video_data_save containing path traversal sequences such as ../ or absolute paths in body parameters.
Unexpected file deletion events on the CRMEB application host, particularly for files outside the video upload directory.
Admin API activity from unusual source IP addresses or outside normal administrator working hours.

Detection Strategies

Inspect web server and application logs for POST requests to the /adminapi/file/video_data_save endpoint and correlate with the requesting account.
Enable filesystem auditing on directories hosting CRMEB code, configuration, and uploads to capture unlink and delete syscalls.
Deploy web application firewall (WAF) rules that block path traversal patterns in request bodies targeting admin endpoints.

Monitoring Recommendations

Alert on administrator account logins followed by requests to file management endpoints within short time windows.
Track baseline file counts and modification timestamps in CRMEB installation directories to detect anomalous deletions.
Forward web and filesystem telemetry to a centralized logging platform for correlation and retention.

How to Mitigate CVE-2026-79426

Immediate Actions Required

Restrict access to the CRMEB admin interface using network controls, VPN, or IP allow-listing until a vendor fix is applied.
Rotate credentials for all administrative accounts and enforce strong, unique passwords with multi-factor authentication where supported.
Audit admin account inventory and remove unused or over-privileged accounts that could reach the vulnerable endpoint.
Back up the CRMEB application directory, uploads, and database to enable recovery if arbitrary deletion occurs.

Patch Information

No vendor advisory URL or fixed version is listed in the enriched CVE data at the time of publication. Monitor the CRMEB GitHub repository and the security advisory for CVE-2026-79426 for updates and apply patches as soon as they are released.

Workarounds

Block or reverse-proxy filter requests to /adminapi/file/video_data_save at the WAF or ingress layer until a patch is available.
Run the CRMEB process under a least-privileged operating system account so the process cannot delete files outside its required scope.
Deny path traversal characters and absolute paths in request bodies targeting admin file endpoints using WAF signatures.

bash

# Example NGINX rule to block the vulnerable endpoint pending a patch
location = /adminapi/file/video_data_save {
    return 403;
}