CVE-2026-12246

HIGHNVD 8.18.1—
EchelonGraph scoreHIGH 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
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 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(high)
EPSS
17.9%
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 (4.8.0-1ubuntu0.1~esm1) @ noble2026-07-07ubuntu

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 46× in last 7d / 82× 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. 2026-07-07 00:55 UTCEG score recompute
  2. 2026-07-07 00:55 UTCVendor advisory
  3. 2026-07-07 00:55 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 12:13 UTCEG score recompute
  6. 2026-07-06 12:13 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-05 23:28 UTCEG score recompute
  9. 2026-07-05 23:28 UTCVendor advisory
  10. 2026-07-05 23:28 UTCGHSA enrichment
  11. 2026-07-05 10:47 UTCEG score recompute
  12. 2026-07-05 10:47 UTCVendor advisory
  13. 2026-07-05 10:47 UTCGHSA enrichment
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-04 22:06 UTCEG score recompute
  17. 2026-07-04 22:06 UTCVendor advisory
  18. 2026-07-04 22:05 UTCGHSA enrichment
  19. 2026-07-04 09:24 UTCEG score recompute
  20. 2026-07-04 09:24 UTCVendor advisory
  21. 2026-07-04 09:24 UTCGHSA enrichment
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-03 20:43 UTCEG score recompute
  24. 2026-07-03 20:43 UTCVendor advisory
  25. 2026-07-03 20:42 UTCGHSA enrichment
Show 57 more
  1. 2026-07-03 08:00 UTCEG score recompute
  2. 2026-07-03 08:00 UTCVendor advisory
  3. 2026-07-03 08:00 UTCGHSA enrichment
  4. 2026-07-02 19:19 UTCEG score recompute
  5. 2026-07-02 19:19 UTCVendor advisory
  6. 2026-07-02 19:18 UTCGHSA enrichment
  7. 2026-07-02 06:37 UTCEG score recompute
  8. 2026-07-02 06:37 UTCVendor advisory
  9. 2026-07-02 06:37 UTCGHSA enrichment
  10. 2026-07-01 17:55 UTCEG score recompute
  11. 2026-07-01 17:55 UTCVendor advisory
  12. 2026-07-01 17:55 UTCGHSA enrichment
  13. 2026-07-01 15:06 UTCEPSS rescore
  14. 2026-07-01 15:06 UTCEPSS rescore
  15. 2026-07-01 05:13 UTCEG score recompute
  16. 2026-07-01 05:13 UTCVendor advisory
  17. 2026-07-01 05:13 UTCGHSA enrichment
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 16:32 UTCEG score recompute
  20. 2026-06-30 16:32 UTCVendor advisory
  21. 2026-06-30 16:32 UTCGHSA enrichment
  22. 2026-06-30 03:51 UTCEG score recompute
  23. 2026-06-30 03:51 UTCVendor advisory
  24. 2026-06-30 03:51 UTCGHSA enrichment
  25. 2026-06-29 15:08 UTCEG score recompute
  26. 2026-06-29 15:08 UTCVendor advisory
  27. 2026-06-29 15:08 UTCGHSA enrichment
  28. 2026-06-29 14:06 UTCEPSS rescore
  29. 2026-06-29 02:26 UTCEG score recompute
  30. 2026-06-29 02:26 UTCVendor advisory
  31. 2026-06-29 02:26 UTCGHSA enrichment
  32. 2026-06-28 14:07 UTCEPSS rescore
  33. 2026-06-28 13:44 UTCEG score recompute
  34. 2026-06-28 13:44 UTCVendor advisory
  35. 2026-06-28 13:44 UTCGHSA enrichment
  36. 2026-06-28 04:56 UTCEPSS rescore
  37. 2026-06-28 04:56 UTCEPSS rescore
  38. 2026-06-28 01:03 UTCEG score recompute
  39. 2026-06-28 01:03 UTCVendor advisory
  40. 2026-06-28 01:02 UTCGHSA enrichment
  41. 2026-06-27 12:21 UTCEG score recompute
  42. 2026-06-27 12:21 UTCVendor advisory
  43. 2026-06-27 12:21 UTCGHSA enrichment
  44. 2026-06-27 03:08 UTCEPSS rescore
  45. 2026-06-26 23:39 UTCEG score recompute
  46. 2026-06-26 23:39 UTCVendor advisory
  47. 2026-06-26 23:39 UTCGHSA enrichment
  48. 2026-06-26 10:58 UTCEG score recompute▲ 0.90
  49. 2026-06-26 10:58 UTCVendor advisory
  50. 2026-06-26 10:58 UTCGHSA enrichment
  51. 2026-06-26 03:53 UTCNVD updateCVSS v3 → 8.1
  52. 2026-06-25 20:48 UTCEG score recompute
  53. 2026-06-25 20:48 UTCVendor advisory
  54. 2026-06-25 20:48 UTCGHSA enrichment
  55. 2026-06-25 13:49 UTCEPSS rescore
  56. 2026-06-25 08:06 UTCEG score recompute
  57. 2026-06-25 08:05 UTCNVD updatefirst tracked

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 17.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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