CVE-2026-11884

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM 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
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(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
27.4%
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 9× in last 7d / 53× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 23:36 UTCGHSA enrichment
  11. 2026-07-16 17:02 UTCEPSS rescore
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 16:40 UTCGHSA enrichment
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-14 14:21 UTCGHSA enrichment
  16. 2026-07-13 22:30 UTCEPSS rescore
  17. 2026-07-13 13:56 UTCGHSA enrichment
  18. 2026-07-13 06:12 UTCEPSS rescore
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-12 04:01 UTCGHSA enrichment
  21. 2026-07-11 08:27 UTCEPSS rescore
  22. 2026-07-11 03:35 UTCGHSA enrichment
  23. 2026-07-09 22:53 UTCGHSA enrichment
  24. 2026-07-09 19:10 UTCEPSS rescore
  25. 2026-07-08 22:27 UTCGHSA enrichment
Show 62 more
  1. 2026-07-08 15:15 UTCEPSS rescore
  2. 2026-07-08 15:15 UTCEPSS rescore
  3. 2026-07-07 22:02 UTCGHSA enrichment
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 19:49 UTCGHSA enrichment
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 19:24 UTCGHSA enrichment
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 15:42 UTCGHSA enrichment
  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 UTCGHSA enrichment
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 14:12 UTCGHSA enrichment
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-29 13:34 UTCGHSA enrichment
  21. 2026-06-28 14:07 UTCEPSS rescore
  22. 2026-06-28 13:09 UTCGHSA enrichment
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 12:44 UTCGHSA enrichment
  26. 2026-06-27 03:08 UTCEPSS rescore
  27. 2026-06-26 12:18 UTCGHSA enrichment
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-25 05:32 UTCGHSA enrichment
  30. 2026-06-24 14:05 UTCEPSS rescore
  31. 2026-06-24 05:03 UTCGHSA enrichment
  32. 2026-06-23 21:32 UTCEPSS rescore
  33. 2026-06-23 04:36 UTCGHSA enrichment
  34. 2026-06-22 14:25 UTCEPSS rescore
  35. 2026-06-22 14:25 UTCEPSS rescore
  36. 2026-06-22 04:10 UTCGHSA enrichment
  37. 2026-06-21 14:56 UTCEPSS rescore
  38. 2026-06-21 14:56 UTCEPSS rescore
  39. 2026-06-21 01:59 UTCEPSS rescore
  40. 2026-06-21 01:59 UTCEPSS rescore
  41. 2026-06-20 21:12 UTCGHSA enrichment
  42. 2026-06-19 19:44 UTCGHSA enrichment
  43. 2026-06-19 19:25 UTCEPSS rescore
  44. 2026-06-18 19:18 UTCGHSA enrichment
  45. 2026-06-18 17:52 UTCEPSS rescore
  46. 2026-06-17 18:25 UTCGHSA enrichment
  47. 2026-06-17 17:53 UTCEPSS rescore
  48. 2026-06-16 17:59 UTCGHSA enrichment
  49. 2026-06-16 17:52 UTCEPSS rescore
  50. 2026-06-15 17:48 UTCEPSS rescore
  51. 2026-06-15 17:33 UTCGHSA enrichment
  52. 2026-06-14 23:18 UTCEPSS rescore
  53. 2026-06-14 17:06 UTCGHSA enrichment
  54. 2026-06-13 23:00 UTCEPSS rescore
  55. 2026-06-13 23:00 UTCEPSS rescore
  56. 2026-06-13 16:40 UTCGHSA enrichment
  57. 2026-06-12 23:12 UTCEPSS rescore
  58. 2026-06-12 16:13 UTCGHSA enrichment
  59. 2026-06-11 15:47 UTCGHSA enrichment
  60. 2026-06-11 14:00 UTCEPSS rescore
  61. 2026-06-10 15:20 UTCEG score recompute
  62. 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 27.4% 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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