CVE-2026-18453

EUVD-2026-72456
A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 55.72%
Debian logo
Debian Releases
Debian Product
Codename
389-ds-base
bookworm
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://access.redhat.com/errata/RHSA-2026:64771
https://access.redhat.com/errata/RHSA-2026:64776
https://access.redhat.com/errata/RHSA-2026:64778
https://access.redhat.com/errata/RHSA-2026:64779
https://access.redhat.com/errata/RHSA-2026:64780
https://access.redhat.com/errata/RHSA-2026:64781
https://access.redhat.com/errata/RHSA-2026:64783
https://access.redhat.com/errata/RHSA-2026:64784
https://access.redhat.com/errata/RHSA-2026:64785
https://access.redhat.com/errata/RHSA-2026:64789
https://access.redhat.com/errata/RHSA-2026:64790
https://access.redhat.com/errata/RHSA-2026:64791
https://access.redhat.com/errata/RHSA-2026:64792
https://access.redhat.com/errata/RHSA-2026:64793
https://access.redhat.com/errata/RHSA-2026:64804
https://access.redhat.com/security/cve/CVE-2026-18453
https://bugzilla.redhat.com/show_bug.cgi?id=2509696