Allocation of Resources Without Limits or Throttling Affecting 389ds/389-ds-base package, versions [,2.8.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-389DS389DSBASE-16771341
- published20 May 2026
- disclosed20 May 2026
- creditOleh Konko
Introduced: 20 May 2026
CVE-2026-9064 (opens in a new tab)How to fix?
Upgrade 389ds/389-ds-base to version 2.8.1 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the get_ldapmessage_controls_ext function. An attacker can exhaust system memory and CPU resources by sending a crafted LDAP request containing an excessive number of minimal controls, leading to degraded performance, worker thread starvation, or out-of-memory conditions. This is only exploitable if the LDAP port is accessible to untrusted networks.
Workaround
This vulnerability can be mitigated by restricting network access to the LDAP port (389/tcp, 636/tcp) to trusted networks using firewall rules or network ACLs. Optionally, lowering the nsslapd-maxbersize configuration parameter can reduce the maximum BER message size accepted by the server, though this does not fully eliminate the issue.