CRITICAL 9.0 NVD
CVE-2026-86345
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
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.
References
- https://access.redhat.com/security/cve/CVE-2026-86345
- https://bugzilla.redhat.com/show_bug.cgi?id=2529332
This critical severity vulnerability with a CVSS score of 9.0 was published on 2026-10-02 via NVD.
Risk Timeline
CVE Disclosed2026-10-02 · -1 days ago
Remediation Resources
Official Advisory
access.redhat.com/security/cve/CVE-2026-86345Analysis & PoC
bugzilla.redhat.com/show_bug.cgi?id=2529332
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