CVE-2026-18916

HIGHNVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory published 2026-09-01. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

August 26, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Aug 26, 2026
No patch confirmed yet.
generic
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txt

Vendor Advisories for CVE-2026-18916(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:12(1)
PackageVulnerable rangeFixed inDependents
nsd4.10.1-1 ... 4.9.1-1 (24 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nsd4.12.0-1 ... 4.15.1-1 (15 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nsd4.12.0-1 ... 4.15.0~rc1-1 (14 versions)4.15.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 75× 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.

  1. 2026-09-19 14:32 UTCGHSA enrichment
  2. 2026-09-19 01:42 UTCEG score recompute
  3. 2026-09-19 01:42 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 12:57 UTCGHSA enrichment
  6. 2026-09-18 00:13 UTCEG score recompute
  7. 2026-09-18 00:13 UTCGHSA enrichment
  8. 2026-09-17 11:29 UTCGHSA enrichment
  9. 2026-09-16 22:39 UTCEG score recompute
  10. 2026-09-16 22:39 UTCGHSA enrichment
  11. 2026-09-16 14:07 UTCEPSS rescore
  12. 2026-09-16 09:45 UTCEG score recompute
  13. 2026-09-16 09:45 UTCGHSA enrichment
  14. 2026-09-16 05:14 UTCEPSS rescore
  15. 2026-09-15 21:00 UTCGHSA enrichment
  16. 2026-09-15 07:38 UTCEG score recompute
  17. 2026-09-15 07:38 UTCGHSA enrichment
  18. 2026-09-14 18:54 UTCGHSA enrichment
  19. 2026-09-14 06:01 UTCGHSA enrichment
  20. 2026-09-13 17:17 UTCEG score recompute
  21. 2026-09-13 17:17 UTCGHSA enrichment
  22. 2026-09-13 16:46 UTCEPSS rescore
  23. 2026-09-13 04:33 UTCGHSA enrichment
  24. 2026-09-12 15:49 UTCEG score recompute
  25. 2026-09-12 15:49 UTCGHSA enrichment
Show 50 more
  1. 2026-09-12 15:00 UTCEPSS rescore
  2. 2026-09-12 03:05 UTCEG score recompute
  3. 2026-09-12 03:05 UTCGHSA enrichment
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-11 14:20 UTCEG score recompute
  6. 2026-09-11 14:20 UTCGHSA enrichment
  7. 2026-09-11 09:36 UTCEPSS rescore
  8. 2026-09-11 01:36 UTCGHSA enrichment
  9. 2026-09-10 12:52 UTCEG score recompute
  10. 2026-09-10 12:52 UTCGHSA enrichment
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-10 00:07 UTCGHSA enrichment
  13. 2026-09-09 09:04 UTCEG score recompute
  14. 2026-09-09 09:04 UTCGHSA enrichment
  15. 2026-09-08 22:00 UTCEPSS rescore
  16. 2026-09-08 20:20 UTCEG score recompute▲ 0.60
  17. 2026-09-08 20:20 UTCGHSA enrichment
  18. 2026-09-08 20:10 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  19. 2026-09-08 11:28 UTCEG score recompute
  20. 2026-09-08 11:28 UTCGHSA enrichment
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-07 11:05 UTCEG score recompute
  23. 2026-09-07 11:05 UTCGHSA enrichment
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-06 13:03 UTCEG score recompute
  26. 2026-09-06 13:03 UTCGHSA enrichment
  27. 2026-09-05 15:03 UTCGHSA enrichment
  28. 2026-09-04 17:00 UTCEG score recompute
  29. 2026-09-04 17:00 UTCGHSA enrichment
  30. 2026-09-04 05:06 UTCEPSS rescore
  31. 2026-09-03 19:00 UTCGHSA enrichment
  32. 2026-09-02 20:35 UTCEG score recompute
  33. 2026-09-02 20:35 UTCGHSA enrichment
  34. 2026-09-02 14:11 UTCEPSS rescore
  35. 2026-09-01 21:10 UTCEG score recompute
  36. 2026-09-01 13:53 UTCEPSS rescore
  37. 2026-09-01 04:39 UTCEPSS rescore
  38. 2026-08-31 05:54 UTCEG score recompute
  39. 2026-08-30 19:17 UTCEPSS rescore
  40. 2026-08-30 07:54 UTCEG score recompute
  41. 2026-08-30 01:22 UTCEPSS rescore
  42. 2026-08-29 09:54 UTCEG score recompute
  43. 2026-08-28 21:41 UTCEPSS rescore
  44. 2026-08-28 11:54 UTCEG score recompute
  45. 2026-08-27 14:25 UTCEPSS rescore
  46. 2026-08-26 15:54 UTCEG score recompute
  47. 2026-08-26 14:46 UTCEPSS rescore
  48. 2026-08-26 14:44 UTCEG score recompute
  49. 2026-08-26 08:49 UTCEG score recompute
  50. 2026-08-26 08:48 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18916?
CVE-2026-18916 is a high vulnerability published on August 26, 2026. Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance.
When was CVE-2026-18916 disclosed?
CVE-2026-18916 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18916 actively exploited?
CVE-2026-18916 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 70.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18916?
CVE-2026-18916 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-18916?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18916, 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-2026-18916

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