Authenticated LDAP trust-data modification via read-level ACI
Published Aug 11, 2026 · Updated Aug 11, 2026
Incorrect authorization in Red Hat Enterprise Linux 7 through 10 allows remote authenticated users to alter IdM trust identity data. The trust-fetch-domains command checks the default read-level trust ACI, then a root-owned helper accepts topology from a caller-selected server and writes it to LDAP. An ordinary IdM account and an established Active Directory cross-forest trust are required; affected servers accept attacker-controlled domain, SID, and ID-range records, while account impersonation also requires interception and recovery of the interrealm secret.
Summary
What happened
Incorrect authorization in Red Hat Enterprise Linux 7 through 10 allows remote authenticated users to alter IdM trust identity data. The trust-fetch-domains command checks the default read-level trust ACI, then a root-owned helper accepts topology from a caller-selected server and writes it to LDAP. An ordinary IdM account and an established Active Directory cross-forest trust are required; affected servers accept attacker-controlled domain, SID, and ID-range records, while account impersonation also requires interception and recovery of the interrealm secret.
The record
- CVE
- CVE-2026-19550
- Published
- Aug 11, 2026
- Updated
- Aug 11, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-863, T1098
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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