{"id":"CVE-2026-88834","title":"A flaw was found in BusyBox's httpd web server","summary":"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…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-203"],"vendor":"Red Hat","product":"busybox","affected":["busybox (all versions)"],"published":"2026-10-13","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:33:26.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88834","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-88834","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531348","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88834.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88834"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88834"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.0022,"epssPercentile":0.12376,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T17:16:29.520798Z"},"ingestedAt":"2026-10-13T17:38:53.201Z","slug":"CVE-2026-88834","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · updated 2026-10-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88834.json)","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}