CVE-2026-12246

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

A fix is available — apply it.

NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity81% × 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 26, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt

Vendor Advisories for CVE-2026-12246(1)

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
ubuntunsd (4.1.17-1ubuntu0.1~esm1) @ bionic2026-08-30ubuntu

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

(2 across 2 ecosystems)
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
nsd—4.14.3-r0—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nsd4.12.0-1 ... 4.14.2-1 (11 versions)4.14.3-1—

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 81× 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 287 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-12246?
CVE-2026-12246 is a high vulnerability published on June 25, 2026. NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.
When was CVE-2026-12246 disclosed?
CVE-2026-12246 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12246 actively exploited?
CVE-2026-12246 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 77.6% of all scored CVEs.
What is the CVSS score of CVE-2026-12246?
CVE-2026-12246 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-12246?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12246, 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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