CVE-2026-11793

4.9 mediumEPSS 0.3%

Medium (4.9) in redhat 389 directory server. EPSS 0.3% chance of exploitation in the next 30 days.

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 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.

Severity

CVSS 3.1

4.9 medium

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
CWE: CWE-121
Published: 2026-06-09
Modified: 2026-08-07
Record from: the NVD, synced 2026-10-19

Affected

redhat:389_directory_server

References

https://access.redhat.com/security/cve/CVE-2026-11793
https://bugzilla.redhat.com/show_bug.cgi?id=2484914

Check your stack JSON