Regular Expression Denial of Service Vulnerability in aaPanel by aaPanel
CVE-2026-29856

7.5HIGH

Key Information:

Vendor

aaPanel

Status
aaPanel
Vendor
CVE Published:
18 March 2026

What is CVE-2026-29856?

A vulnerability exists within the VirtualHost configuration handling component of aaPanel version 7.57.0, which can be exploited by attackers to perform a Regular Expression Denial of Service (ReDoS). By providing specially crafted input, an adversary can manipulate the way the system processes regular expressions, potentially leading to a denial of service for legitimate users. This vulnerability underscores the importance of robust input validation and configuration management.

References

https://github.com/aapanel/aapanel
https://github.com/mbiesiad/vulnerability-research/tree/m...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.