CVE-2026-11884

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-06-10. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the oc_superior (SUP) field length is omitted from buffer size calculations in read_schema_dse() and schema_oc_to_string(), but the field is still written via strcat(). An attacker with Directory Manager privileges, or a compromised replication supplier, can trigger a server crash by creating objectclasses with long SUP values. This is an incomplete fix variant of CVE-2025-14905.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
27.0%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 30, 2026

Advisory Details (4)

Auto-updated Jun 12, 2026
Patch available. Sources: redhat.
generic

Jira

https://redhat.atlassian.net/browse/PSIRTSUPT-7600
redhat

2484913 – (CVE-2026-11884) CVE-2026-11884 389-ds-base: 389-ds-base: heap buffer overflow in schema objectclass serialization due to missing oc_superior in size calculation

https://bugzilla.redhat.com/show_bug.cgi?id=2484913
redhat Patch Available

2423624 – (CVE-2025-14905) CVE-2025-14905 389-ds-base: 389-ds-base: Remote Code Execution and Denial of Service via heap buffer overflow

Affected: Red Hat Enterprise Linux 9

https://bugzilla.redhat.com/show_bug.cgi?id=2423624
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-11884

Vendor Advisories for CVE-2026-11884(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 20× in last 7d / 82× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 02:23 UTCEPSS rescore
  3. 2026-07-05 19:49 UTCEG score recompute
  4. 2026-07-05 19:49 UTCGHSA enrichment
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 19:24 UTCEG score recompute
  8. 2026-07-04 19:24 UTCGHSA enrichment
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-03 15:42 UTCEG score recompute
  11. 2026-07-03 15:42 UTCGHSA enrichment
  12. 2026-07-02 15:16 UTCEG score recompute
  13. 2026-07-02 15:16 UTCGHSA enrichment
  14. 2026-07-01 15:06 UTCEPSS rescore
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-07-01 14:38 UTCEG score recompute
  17. 2026-07-01 14:38 UTCGHSA enrichment
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 14:13 UTCEG score recompute
  20. 2026-06-30 14:12 UTCGHSA enrichment
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 13:34 UTCEG score recompute
  23. 2026-06-29 13:34 UTCGHSA enrichment
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 13:09 UTCEG score recompute
Show 57 more
  1. 2026-06-28 13:09 UTCGHSA enrichment
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 12:44 UTCEG score recompute
  5. 2026-06-27 12:44 UTCGHSA enrichment
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-26 12:19 UTCEG score recompute
  8. 2026-06-26 12:18 UTCGHSA enrichment
  9. 2026-06-25 13:49 UTCEPSS rescore
  10. 2026-06-25 05:32 UTCEG score recompute
  11. 2026-06-25 05:32 UTCGHSA enrichment
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-24 05:03 UTCEG score recompute
  14. 2026-06-24 05:03 UTCGHSA enrichment
  15. 2026-06-23 21:32 UTCEPSS rescore
  16. 2026-06-23 04:36 UTCEG score recompute
  17. 2026-06-23 04:36 UTCGHSA enrichment
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-22 04:10 UTCEG score recompute
  21. 2026-06-22 04:10 UTCGHSA enrichment
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 14:56 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-21 01:59 UTCEPSS rescore
  26. 2026-06-20 21:13 UTCEG score recompute
  27. 2026-06-20 21:12 UTCGHSA enrichment
  28. 2026-06-19 19:44 UTCEG score recompute
  29. 2026-06-19 19:44 UTCGHSA enrichment
  30. 2026-06-19 19:25 UTCEPSS rescore
  31. 2026-06-18 19:19 UTCEG score recompute
  32. 2026-06-18 19:18 UTCGHSA enrichment
  33. 2026-06-18 17:52 UTCEPSS rescore
  34. 2026-06-17 18:26 UTCEG score recompute
  35. 2026-06-17 18:25 UTCGHSA enrichment
  36. 2026-06-17 17:53 UTCEPSS rescore
  37. 2026-06-16 17:59 UTCEG score recompute
  38. 2026-06-16 17:59 UTCGHSA enrichment
  39. 2026-06-16 17:52 UTCEPSS rescore
  40. 2026-06-15 17:48 UTCEPSS rescore
  41. 2026-06-15 17:33 UTCEG score recompute
  42. 2026-06-15 17:33 UTCGHSA enrichment
  43. 2026-06-14 23:18 UTCEPSS rescore
  44. 2026-06-14 17:06 UTCEG score recompute
  45. 2026-06-14 17:06 UTCGHSA enrichment
  46. 2026-06-13 23:00 UTCEPSS rescore
  47. 2026-06-13 23:00 UTCEPSS rescore
  48. 2026-06-13 16:40 UTCEG score recompute
  49. 2026-06-13 16:40 UTCGHSA enrichment
  50. 2026-06-12 23:12 UTCEPSS rescore
  51. 2026-06-12 16:13 UTCEG score recompute
  52. 2026-06-12 16:13 UTCGHSA enrichment
  53. 2026-06-11 15:47 UTCEG score recompute
  54. 2026-06-11 15:47 UTCGHSA enrichment
  55. 2026-06-11 14:00 UTCEPSS rescore
  56. 2026-06-10 15:20 UTCEG score recompute
  57. 2026-06-10 15:18 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-11884?
CVE-2026-11884 is a medium vulnerability published on June 10, 2026. A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the ocsuperior (SUP) field length is omitted from buffer size calculations in readschemadse() and schemaoctostring(), but the field is still written via strcat(). An attacker with Directory…
When was CVE-2026-11884 disclosed?
CVE-2026-11884 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11884 actively exploited?
CVE-2026-11884 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11884?
CVE-2026-11884 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-11884?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11884, 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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