CVE-2026-86345

critical · 9

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.

CVSS

—

EPSS (exploit prob.)

—

EPSS percentile

2026-10-02

Published

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

Weaknesses

CWE-923

References

https://access.redhat.com/security/cve/CVE-2026-86345
https://bugzilla.redhat.com/show_bug.cgi?id=2529332

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-86345