Advisoriesby IbisRed HatCVE-2026-86345
A flaw was found in 389-ds-base
Critical9.0CVE-2026-86345 · Published Oct 2, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Directory Server 11 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Directory Server 12 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Directory Server 13 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-923
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Oct 2 | Red Hat FreeType: resource exhaustion | Medium5.5 | No fix yet |
| Oct 1 | Red Hat 389-ds-base: resource exhaustion | High7.5 | No fix yet |
| Oct 1 | Red Hat Satellite 6: SQL injection | Medium6.5 | No fix yet |
| Oct 1 | Red Hat Satellite 6: observable discrepancy | Medium4.3 | No fix yet |
| Oct 1 | Red Hat Satellite 6: command injection | Medium5.3 | No fix yet |
| Oct 1 | Red Hat Satellite 6: command injection | Medium6.7 | No fix yet |