CVE-2026-50045

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 — 4 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

A fix is available — apply it.

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.

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
20%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50045.txt

Vendor Advisories for CVE-2026-50045(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

(5 across 5 ecosystems)
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
unbound—1.25.2-r0—
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 / 92× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 03:32 UTCEG score recompute
  3. 2026-09-18 03:32 UTCVendor advisory
  4. 2026-09-18 03:32 UTCGHSA enrichment
  5. 2026-09-17 05:18 UTCEG score recompute
  6. 2026-09-17 05:18 UTCVendor advisory
  7. 2026-09-17 05:18 UTCGHSA enrichment
  8. 2026-09-16 14:08 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 05:15 UTCEPSS rescore
  13. 2026-09-14 16:56 UTCVendor advisory
  14. 2026-09-14 16:56 UTCGHSA enrichment
  15. 2026-09-13 16:57 UTCEG score recompute
  16. 2026-09-13 16:57 UTCVendor advisory
  17. 2026-09-13 16:57 UTCGHSA enrichment
  18. 2026-09-13 16:47 UTCEPSS rescore
  19. 2026-09-12 18:43 UTCEG score recompute
  20. 2026-09-12 18:43 UTCVendor advisory
  21. 2026-09-12 18:43 UTCGHSA enrichment
  22. 2026-09-11 20:28 UTCEG score recompute
  23. 2026-09-11 20:28 UTCVendor advisory
  24. 2026-09-11 20:28 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 75 more
  1. 2026-09-10 21:38 UTCEG score recompute
  2. 2026-09-10 21:38 UTCVendor advisory
  3. 2026-09-10 21:38 UTCGHSA enrichment
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-09 09:18 UTCEG score recompute
  6. 2026-09-09 09:18 UTCVendor advisory
  7. 2026-09-09 09:18 UTCGHSA enrichment
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-07 21:42 UTCEG score recompute
  10. 2026-09-07 21:42 UTCVendor advisory
  11. 2026-09-07 21:42 UTCGHSA enrichment
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 17:49 UTCEG score recompute
  14. 2026-09-06 17:49 UTCVendor advisory
  15. 2026-09-06 17:49 UTCGHSA enrichment
  16. 2026-09-06 13:47 UTCEPSS rescore
  17. 2026-09-05 19:35 UTCEG score recompute
  18. 2026-09-05 19:35 UTCVendor advisory
  19. 2026-09-05 19:35 UTCGHSA enrichment
  20. 2026-09-04 13:56 UTCEG score recompute
  21. 2026-09-04 13:56 UTCVendor advisory
  22. 2026-09-04 13:56 UTCGHSA enrichment
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 23:41 UTCEG score recompute
  26. 2026-09-01 23:41 UTCVendor advisory
  27. 2026-09-01 23:41 UTCGHSA enrichment
  28. 2026-09-01 13:54 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-08-30 23:10 UTCEG score recompute
  31. 2026-08-30 23:10 UTCVendor advisory
  32. 2026-08-30 23:10 UTCGHSA enrichment
  33. 2026-08-30 19:17 UTCEPSS rescore
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-30 00:56 UTCEG score recompute
  36. 2026-08-30 00:56 UTCVendor advisory
  37. 2026-08-30 00:55 UTCGHSA enrichment
  38. 2026-08-28 21:41 UTCEPSS rescore
  39. 2026-08-27 21:10 UTCEG score recompute
  40. 2026-08-27 21:10 UTCVendor advisory
  41. 2026-08-27 21:10 UTCGHSA enrichment
  42. 2026-08-27 14:25 UTCEPSS rescore
  43. 2026-08-26 19:58 UTCEG score recompute
  44. 2026-08-26 19:58 UTCVendor advisory
  45. 2026-08-26 19:58 UTCGHSA enrichment
  46. 2026-08-26 14:46 UTCEPSS rescore
  47. 2026-08-25 18:17 UTCEG score recompute
  48. 2026-08-25 18:17 UTCVendor advisory
  49. 2026-08-25 18:17 UTCGHSA enrichment
  50. 2026-08-25 13:49 UTCEPSS rescore
  51. 2026-08-24 19:57 UTCEG score recompute
  52. 2026-08-24 19:57 UTCVendor advisory
  53. 2026-08-24 19:56 UTCGHSA enrichment
  54. 2026-08-23 21:42 UTCEG score recompute
  55. 2026-08-23 21:42 UTCVendor advisory
  56. 2026-08-23 21:42 UTCGHSA enrichment
  57. 2026-08-23 00:19 UTCEPSS rescore
  58. 2026-08-22 23:28 UTCVendor advisory
  59. 2026-08-22 23:28 UTCGHSA enrichment
  60. 2026-08-22 01:14 UTCEG score recompute
  61. 2026-08-22 01:14 UTCVendor advisory
  62. 2026-08-22 01:14 UTCGHSA enrichment
  63. 2026-08-21 23:49 UTCEPSS rescore
  64. 2026-08-21 02:59 UTCEG score recompute
  65. 2026-08-21 02:59 UTCVendor advisory
  66. 2026-08-21 02:59 UTCGHSA enrichment
  67. 2026-08-20 22:55 UTCEPSS rescore
  68. 2026-08-20 04:45 UTCEG score recompute
  69. 2026-08-20 04:45 UTCVendor advisory
  70. 2026-08-20 04:45 UTCGHSA enrichment
  71. 2026-08-19 17:04 UTCEPSS rescore
  72. 2026-08-19 06:30 UTCEG score recompute
  73. 2026-08-19 06:30 UTCVendor advisory
  74. 2026-08-19 06:30 UTCGHSA enrichment
  75. 2026-08-18 13:48 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-50045?
CVE-2026-50045 is a medium vulnerability published on July 22, 2026. In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that…
When was CVE-2026-50045 disclosed?
CVE-2026-50045 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50045 actively exploited?
CVE-2026-50045 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 79.5% of all scored CVEs.
What is the CVSS score of CVE-2026-50045?
CVE-2026-50045 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-50045?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50045, 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.

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