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
Trending — 4 sources updated this week
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
ubuntunsd3 (4.1.7-1ubuntu0.1~esm1) @ xenial2026-07-27ubuntu

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.

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 16× in last 7d / 104× 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 125 total refreshes for this CVE.

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

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 77.8% 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.

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