rootpwn

critical · CVSS v3 9

CVE-2026-86345

A flaw was found in 389-ds-base. The server does not discard plaintext bytes already buffered from a client connection w…

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.

Scores

Severity
critical
CVSS v2
7.6
CVSS v3
9
CVSS v4
—
EPSS
—

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