CVE-2026-86345

Published: Oct 2, 2026Modified: Oct 7, 2026

9.0

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitability: 2.2 / Impact: 6.0

Source: secalert@redhat.com (Secondary)

Description

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.

Related CWEs

CWE-923

Improper Restriction of Communication Channel to Intended Endpoints

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

References (2)

https://access.redhat.com/security/cve/CVE-2026-86345

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2529332

Source: secalert@redhat.com

Timeline

No history available yet.