Vulnerability in Red Hat Hardened Images

[ Description ]Official description

A flaw was found in BusyBox's httpd web server. When configured with system password authentication, a user existence oracle may exist in certain build configurations. An attacker could distinguish existing from non-existing usernames by observing authentication failure behavior. Impact is limited to username enumeration and requires non-default compile options or uncommon password file states; default BusyBox builds with shadow password support are not affected.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3914

  BusyBox: Multiple vulnerabilities Translated from German

  CVE-2026-88833CVE-2026-88834CVE-2026-88838

[ References ]References

• access.redhat.com/security/cve/CVE-2026-88834
• bugzilla.redhat.com/show_bug.cgi