Hi,

The following vulnerability was published for 389-ds-base.

CVE-2026-86345[0]:
| A flaw was found in 389-ds-base. The server does not discard
| plaintext bytes already buffered from a client connection when
| negotiating StartTLS, allowing an on-path attacker to inject a
| crafted LDAP message that is processed after the TLS upgrade and
| whose response is delivered to the client in place of the client's
| own pending operation's response, due to messageID collision. This
| can cause a client application to treat a failed authentication
| (bind) attempt as successful.

At this time though only the Red Hat bugzilla entry was known to me,
is this tracked upstream?


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-86345
https://www.cve.org/CVERecord?id=CVE-2026-86345
[1] https://bugzilla.redhat.com/show_bug.cgi?id=2529332

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore