CVE-2026-86345

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-02. A secondary CVSS source baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
9.0
EG Score
9.0CRITICALhigh confidence
EG Risk
45
EG Risk 45/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 1, 2026

Last Modified

October 2, 2026

Advisory Details (2)

Auto-updated Oct 1, 2026
Patch available. Sources: redhat.
redhat

2529332 – (CVE-2026-86345) CVE-2026-86345 389-ds-base: 389-ds-base: StartTLS plaintext-buffer retention allows on-path attacker to forge an LDAP client's authentication result

https://bugzilla.redhat.com/show_bug.cgi?id=2529332
redhat Patch Available

CVE-2026-86345 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-86345

Vendor Advisories for CVE-2026-86345(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 09:04 UTCGHSA enrichment
  2. 2026-10-04 04:49 UTCGHSA enrichment
  3. 2026-10-04 00:35 UTCGHSA enrichment
  4. 2026-10-03 20:20 UTCGHSA enrichment
  5. 2026-10-03 16:07 UTCEG score recompute
  6. 2026-10-03 16:06 UTCGHSA enrichment
  7. 2026-10-03 11:52 UTCGHSA enrichment
  8. 2026-10-03 07:37 UTCGHSA enrichment
  9. 2026-10-03 03:21 UTCGHSA enrichment
  10. 2026-10-02 23:06 UTCGHSA enrichment
  11. 2026-10-02 18:51 UTCEG score recompute
  12. 2026-10-02 18:51 UTCGHSA enrichment
  13. 2026-10-02 17:57 UTCEPSS rescore
  14. 2026-10-02 17:53 UTCGHSA enrichment
  15. 2026-10-02 13:39 UTCGHSA enrichment
  16. 2026-10-02 09:20 UTCGHSA enrichment
  17. 2026-10-02 05:06 UTCGHSA enrichment
  18. 2026-10-02 00:52 UTCEG score recompute
  19. 2026-10-02 00:51 UTCGHSA enrichment
  20. 2026-10-02 00:25 UTCEG score recompute
  21. 2026-10-01 23:36 UTCEG score recompute
  22. 2026-10-01 23:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86345?
CVE-2026-86345 is a critical vulnerability published on October 1, 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…
When was CVE-2026-86345 disclosed?
CVE-2026-86345 was first published on October 1, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86345 actively exploited?
CVE-2026-86345 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-86345?
CVE-2026-86345 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-86345?
A fix for CVE-2026-86345 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-86345 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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