CVEvulnerability

CVE-2026-86345

9.0 CRITICAL Published 2026-10-02 Modified 2026-10-07 Official page ↗
Status
Awaiting Analysis
Published
2026-10-02
Last modified
2026-10-07
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.0 CRITICAL — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-923

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

Weakness · CWE (1)

  • CWE-923 Improper Restriction of Communication Channel to Intended Endpoints weakness

References