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 23× in last 7d / 97× 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 197 total refreshes for this CVE.

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

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 81.0% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-14586

Explore →

Is Your Infrastructure Affected by CVE-2026-14586?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs