CVE-2026-16560

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-22. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 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 Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
Patch available. Sources: redhat.
redhat

2506102 – (CVE-2026-16560) CVE-2026-16560 389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued RDN

https://bugzilla.redhat.com/show_bug.cgi?id=2506102
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16560

Vendor Advisories for CVE-2026-16560(1)

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

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 16× in last 7d / 70× 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 149 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16560?
CVE-2026-16560 is a medium vulnerability published on July 22, 2026. A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.
When was CVE-2026-16560 disclosed?
CVE-2026-16560 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16560 actively exploited?
CVE-2026-16560 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.8% of all scored CVEs.
What is the CVSS score of CVE-2026-16560?
CVE-2026-16560 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-16560?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16560, 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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