Directory Traversal Vulnerability in Bisheng by DataElement
CVE-2026-51859

9.1CRITICAL

Key Information:

Vendor

DataElement

Status
Bisheng
Vendor
CVE Published:
30 September 2026

What is CVE-2026-51859?

Bisheng versions 2.3.0, 2.4.0, and the beta release 2.4.0-beta1 have a serious directory traversal vulnerability that can be exploited through the 'save_download_file' function. This flaw allows an attacker to manipulate the file path, potentially gaining unauthorized access to sensitive directories and files on the server. Proper validation and sanitization of file paths are essential to mitigate this security risk.

References

https://github.com/dataelement/bisheng/issues/1994
https://gist.github.com/Ro1ME/df160925a60dd917550f7c87bfe...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.