non-default shadow-disabled builds · Busybox: busybox: httpd user existence oracle
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 3.7 Low.
Data as of 28 Oct 2026, 10:00 UTC
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat Hardened Images | Affected– | Fixed in– |
AI-suggested
Users should monitor vendor advisories for updates. Since this vulnerability requires non-default shadow-disabled builds, using default configurations with shadow support enabled may mitigate the issue. No further specific mitigation guidance is available from the vendor.
Description
CVE-2026-88834 is a vulnerability in Busybox httpd that allows an attacker to perform a user existence oracle in non-default shadow-disabled builds. This flaw can potentially reveal whether a user exists on the system, which may aid further attacks. The vulnerability is identified in Busybox version 3.0.