Stack-Based Buffer Overflow in BusyBox's httpd Web Server
CVE-2026-124739

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 6
Red Hat Hardened Images
Vendor
CVE Published:
11 November 2026

What is CVE-2026-124739?

A vulnerability exists in the BusyBox httpd web server that may allow an attacker to exploit an excessively long index page name in subdirectory configuration files. If a malicious actor has permission to modify these configuration files, they might exploit this flaw to execute arbitrary code with elevated privileges or may lead to a denial of service (DoS) by crashing the server process, compromising the integrity and availability of the web service.

References

https://access.redhat.com/security/cve/CVE-2026-124739
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2571613
issue-trackingx_refsource_REDHAT

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank ducanhluu for reporting this issue.
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