CVE-2026-14586

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-07-22. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for DNS-over-QUIC support in Unbound, it is expected to use monotonic time. Unbound was using realtime instead, and in DoQ environments with high concurrency and under pressure, an assert in libngtcp2 for the quic timestamp would trigger and terminate the server.This vulnerability needs Unbound to be compiled with DoQ support ('--with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-14586.txt

Vendor Advisories for CVE-2026-14586(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatunbound-main-1.25.2-0.1.hum12026-07-22redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
unbound1.13.1-1 ... 1.25.2-1 (47 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
unbound1.17.1-2 ... 1.26.0-2 (25 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
unbound1.22.0-2 ... 1.26.0-2 (15 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
unbound1.22.0-2 ... 1.25.1-1 (9 versions)1.25.2-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 94× 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 205 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-14586?
CVE-2026-14586 is a medium vulnerability published on July 22, 2026. In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for…
When was CVE-2026-14586 disclosed?
CVE-2026-14586 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-2026-14586 actively exploited?
CVE-2026-14586 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 80.8% of all scored CVEs.
What is the CVSS score of CVE-2026-14586?
CVE-2026-14586 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-14586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14586, 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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