CVE-2026-42389

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-25. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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.

This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 25, 2026

References (1)

Vendor Advisories for CVE-2026-42389(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pdns-recursor5.2.4-2 ... 5.4.2-2 (17 versions)5.4.3-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 50× 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 150 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42389?
CVE-2026-42389 is a medium vulnerability published on June 25, 2026. This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
When was CVE-2026-42389 disclosed?
CVE-2026-42389 was first published in the National Vulnerability Database on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42389 actively exploited?
CVE-2026-42389 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 77.7% of all scored CVEs.
What is the CVSS score of CVE-2026-42389?
CVE-2026-42389 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-42389?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42389, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-42389

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