CVE-2026-11790: redhat 389_directory_server Uncontrolled Resource Consumption
Vulnerability summary
CVE-2026-11790 is a medium (CVSS 4.9) Uncontrolled Resource Consumption vulnerability in redhat 389_directory_server. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 30-06-2026Last modifiedVulnerability information updated.
Description
A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker who can modify a user's password hash can cause excessive CPU consumption during authentication, resulting in denial of service.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated4.9MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.9MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- NVDNIST4.9MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
0.00 pp
From 0.29% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat3 products
- 389_directory_server1.3.6.0
- directory_server11.0 | 12.0 | 13.0
- enterprise_linuxEOL7.0 | 8.0 | 9.0 | 10.0
Debian1 product
- 389-ds-baseAll versions (No fix recorded)
Ubuntu1 product
- 389-ds-baseAll versions (No fix recorded)
3 vendors · 5 products
