CVE-2026-9064

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-20. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
56%
KEV
Not listed

Published

May 20, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated May 20, 2026
Patch available. Sources: redhat.
redhat

2480093 – (CVE-2026-9064) CVE-2026-9064 389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS)

https://bugzilla.redhat.com/show_bug.cgi?id=2480093
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-9064

Vendor Advisories for CVE-2026-9064(18)

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

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatdirsrv/dirsrv-container-rhel10:17817141232026-06-18redhat
redhat389-ds-base-0:2.2.4-18.el9_22026-06-17redhat
redhat389-ds-base-0:2.6.1-21.el9_62026-06-17redhat
redhatredhat-ds:11-8060020260609102432.0ca98e7e2026-06-17redhat
redhat389-ds:1.4-8100020260601102239.25e700aa2026-06-17redhat
redhat389-ds:1.4-8080020260610125847.6dbb38032026-06-17redhat
redhat389-ds-base-0:3.2.0-7.el10_22026-06-17redhat
redhat389-ds-base-0:3.0.6-18.el10_02026-06-17redhat
redhat389-ds-base-0:2.4.5-25.el9_42026-06-17redhat
redhatredhat-ds:11-8100020260601104139.37ed7c032026-06-17redhat
redhat389-ds-base-0:1.3.11.1-12.el7_92026-06-17redhat
redhat389-ds:1.4-8040020260609102422.96015a922026-06-17redhat
redhat389-ds:1.4-8060020260609102416.824efc522026-06-17redhat
redhatredhat-ds:11-8080020260610130252.f969626e2026-06-17redhat
redhatredhat-ds:12-9020020260615123354.1674d5742026-06-17redhat
redhat389-ds-base-0:2.8.0-7.el9_82026-06-17redhat
redhatredhat-ds:12-9040020260611130021.1674d5742026-06-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
389-ds-base1.4.4.11-2 ... 3.1.2+vendor1-2 (23 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
389-ds-base2.3.1+dfsg1-1 ... 3.3.0-2 (16 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
389-ds-base3.1.2+dfsg1-1 ... 3.3.0-2 (6 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 29× 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.

Showing the most recent 100 of 263 total refreshes for this CVE.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:32 UTCEPSS rescore
  4. 2026-09-16 14:09 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-13 16:48 UTCEPSS rescore
  8. 2026-09-12 15:02 UTCEPSS rescore
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 09:38 UTCEPSS rescore
  11. 2026-09-10 09:35 UTCEPSS rescore
  12. 2026-09-08 22:01 UTCEPSS rescore
  13. 2026-09-06 13:48 UTCEPSS rescore
  14. 2026-09-05 15:31 UTCEPSS rescore
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-02 14:12 UTCEPSS rescore
  17. 2026-09-01 13:54 UTCEPSS rescore
  18. 2026-09-01 04:40 UTCEPSS rescore
  19. 2026-08-30 19:18 UTCEPSS rescore
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-28 21:42 UTCEPSS rescore
  22. 2026-08-27 14:25 UTCEPSS rescore
  23. 2026-08-26 14:47 UTCEPSS rescore
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-24 14:18 UTCEPSS rescore
Show 75 more
  1. 2026-08-23 16:56 UTCEG score recompute
  2. 2026-08-23 16:56 UTCVendor advisory
  3. 2026-08-23 16:56 UTCGHSA enrichment
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 23:35 UTCVendor advisory
  7. 2026-08-21 23:35 UTCGHSA enrichment
  8. 2026-08-21 12:20 UTCEG score recompute
  9. 2026-08-21 12:20 UTCVendor advisory
  10. 2026-08-21 12:20 UTCGHSA enrichment
  11. 2026-08-21 11:39 UTCEG score recompute
  12. 2026-08-21 11:39 UTCVendor advisory
  13. 2026-08-21 11:39 UTCGHSA enrichment
  14. 2026-08-20 22:56 UTCEPSS rescore
  15. 2026-08-20 18:55 UTCEG score recompute
  16. 2026-08-20 18:55 UTCVendor advisory
  17. 2026-08-20 18:55 UTCGHSA enrichment
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-18 13:49 UTCEPSS rescore
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 09:54 UTCVendor advisory
  22. 2026-08-17 09:54 UTCGHSA enrichment
  23. 2026-08-16 16:55 UTCEG score recompute
  24. 2026-08-16 16:55 UTCVendor advisory
  25. 2026-08-16 16:55 UTCGHSA enrichment
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-16 14:56 UTCEPSS rescore
  28. 2026-08-16 03:30 UTCEG score recompute
  29. 2026-08-16 03:30 UTCVendor advisory
  30. 2026-08-16 03:30 UTCGHSA enrichment
  31. 2026-08-16 02:15 UTCEPSS rescore
  32. 2026-08-15 01:31 UTCEPSS rescore
  33. 2026-08-15 00:03 UTCVendor advisory
  34. 2026-08-15 00:03 UTCGHSA enrichment
  35. 2026-08-14 13:03 UTCVendor advisory
  36. 2026-08-14 13:03 UTCGHSA enrichment
  37. 2026-08-14 02:02 UTCEG score recompute
  38. 2026-08-14 02:02 UTCVendor advisory
  39. 2026-08-14 02:02 UTCGHSA enrichment
  40. 2026-08-13 22:00 UTCEPSS rescore
  41. 2026-08-13 09:58 UTCVendor advisory
  42. 2026-08-13 09:58 UTCGHSA enrichment
  43. 2026-08-12 22:58 UTCEG score recompute
  44. 2026-08-12 22:58 UTCVendor advisory
  45. 2026-08-12 22:58 UTCGHSA enrichment
  46. 2026-08-12 13:51 UTCEPSS rescore
  47. 2026-08-12 11:57 UTCVendor advisory
  48. 2026-08-12 11:57 UTCGHSA enrichment
  49. 2026-08-12 00:52 UTCVendor advisory
  50. 2026-08-12 00:52 UTCGHSA enrichment
  51. 2026-08-11 13:52 UTCEG score recompute
  52. 2026-08-11 13:52 UTCVendor advisory
  53. 2026-08-11 13:52 UTCGHSA enrichment
  54. 2026-08-11 13:43 UTCEPSS rescore
  55. 2026-08-11 00:36 UTCEG score recompute
  56. 2026-08-11 00:36 UTCVendor advisory
  57. 2026-08-11 00:36 UTCGHSA enrichment
  58. 2026-08-11 00:00 UTCEPSS rescore
  59. 2026-08-10 11:19 UTCVendor advisory
  60. 2026-08-10 11:19 UTCGHSA enrichment
  61. 2026-08-09 23:34 UTCEG score recompute
  62. 2026-08-09 23:34 UTCVendor advisory
  63. 2026-08-09 23:33 UTCGHSA enrichment
  64. 2026-08-09 13:47 UTCEPSS rescore
  65. 2026-08-09 12:33 UTCVendor advisory
  66. 2026-08-09 12:33 UTCGHSA enrichment
  67. 2026-08-09 01:32 UTCEG score recompute
  68. 2026-08-09 01:32 UTCVendor advisory
  69. 2026-08-09 01:32 UTCGHSA enrichment
  70. 2026-08-08 16:37 UTCEPSS rescore
  71. 2026-08-08 04:23 UTCVendor advisory
  72. 2026-08-08 04:23 UTCGHSA enrichment
  73. 2026-08-07 17:22 UTCEG score recompute
  74. 2026-08-07 17:22 UTCVendor advisory
  75. 2026-08-07 17:22 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9064?
CVE-2026-9064 is a high vulnerability published on May 20, 2026. A flaw was found in 389-ds-base. The getldapmessagecontrols_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls…
When was CVE-2026-9064 disclosed?
CVE-2026-9064 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9064 actively exploited?
CVE-2026-9064 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 44.5% of all scored CVEs.
What is the CVSS score of CVE-2026-9064?
CVE-2026-9064 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-9064?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9064, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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