Buffer overflow in Red Hat Directory Server 11

CVE-2026-11793

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…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-11793?
CVE-2026-11793 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under Stack-based Buffer Overflow. CVSS score: 4.9/10. Published 2026-06-09.
How severe is CVE-2026-11793?
Medium severity. CVSS v3 base score is 4.9 out of 10.