{"id":"CVE-2026-11793","title":"A stack buffer overflow flaw was found in 389 Directory Server","summary":"A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribut…","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121"],"vendor":"redhat","product":"389_directory_server","affected":["389_directory_server"],"published":"2026-06-09","updated":"2026-08-07","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11793","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-11793","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484914","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00282,"epssPercentile":0.20919,"ingestedAt":"2026-08-07T07:12:17.324Z","slug":"CVE-2026-11793","body":"## Overview\n\nA stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.\n\n## Affected\n\n- `389_directory_server`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}