CVE-2026-12318

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

CVSS v3
7.3
EG Score
7.3(high)
EPSS
17.7%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-60/
generic

Security Vulnerabilities fixed in Firefox 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-57/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2023478

Vendor Advisories for CVE-2026-12318(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
ubuntulibnss3-tools (2:3.114-1ubuntu0.2) @ questing2026-07-06ubuntu

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(1)

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 41× in last 7d / 102× 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 102 total refreshes for this CVE.

  1. 2026-07-06 23:17 UTCEG score recompute
  2. 2026-07-06 23:17 UTCVendor advisory
  3. 2026-07-06 23:17 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 00:18 UTCEG score recompute
  7. 2026-07-06 00:18 UTCVendor advisory
  8. 2026-07-06 00:18 UTCGHSA enrichment
  9. 2026-07-05 11:18 UTCEG score recompute
  10. 2026-07-05 11:18 UTCVendor advisory
  11. 2026-07-05 11:18 UTCGHSA enrichment
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-05 02:30 UTCEPSS rescore
  14. 2026-07-04 22:21 UTCEG score recompute
  15. 2026-07-04 22:21 UTCVendor advisory
  16. 2026-07-04 22:20 UTCGHSA enrichment
  17. 2026-07-04 09:22 UTCEG score recompute
  18. 2026-07-04 09:22 UTCVendor advisory
  19. 2026-07-04 09:22 UTCGHSA enrichment
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 13:49 UTCEG score recompute
  22. 2026-07-03 13:49 UTCVendor advisory
  23. 2026-07-03 13:49 UTCGHSA enrichment
  24. 2026-07-03 00:46 UTCEG score recompute
  25. 2026-07-03 00:46 UTCVendor advisory
Show 75 more
  1. 2026-07-03 00:46 UTCGHSA enrichment
  2. 2026-07-02 11:47 UTCEG score recompute
  3. 2026-07-02 11:47 UTCVendor advisory
  4. 2026-07-02 11:47 UTCGHSA enrichment
  5. 2026-07-01 22:40 UTCEG score recompute
  6. 2026-07-01 22:40 UTCVendor advisory
  7. 2026-07-01 22:40 UTCGHSA enrichment
  8. 2026-07-01 15:06 UTCEPSS rescore
  9. 2026-07-01 15:06 UTCEPSS rescore
  10. 2026-07-01 08:56 UTCEG score recompute
  11. 2026-07-01 08:56 UTCVendor advisory
  12. 2026-07-01 08:56 UTCGHSA enrichment
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-30 19:57 UTCEG score recompute
  15. 2026-06-30 19:57 UTCVendor advisory
  16. 2026-06-30 19:57 UTCGHSA enrichment
  17. 2026-06-30 06:59 UTCEG score recompute
  18. 2026-06-30 06:59 UTCVendor advisory
  19. 2026-06-30 06:59 UTCGHSA enrichment
  20. 2026-06-29 17:52 UTCEG score recompute
  21. 2026-06-29 17:52 UTCGHSA enrichment
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 04:46 UTCEG score recompute
  24. 2026-06-29 04:46 UTCGHSA enrichment
  25. 2026-06-28 15:46 UTCEG score recompute
  26. 2026-06-28 15:46 UTCGHSA enrichment
  27. 2026-06-28 14:07 UTCEPSS rescore
  28. 2026-06-28 04:56 UTCEPSS rescore
  29. 2026-06-28 04:56 UTCEPSS rescore
  30. 2026-06-28 02:46 UTCEG score recompute
  31. 2026-06-28 02:46 UTCGHSA enrichment
  32. 2026-06-27 13:48 UTCEG score recompute
  33. 2026-06-27 13:48 UTCGHSA enrichment
  34. 2026-06-27 03:08 UTCEPSS rescore
  35. 2026-06-27 00:49 UTCEG score recompute
  36. 2026-06-27 00:49 UTCGHSA enrichment
  37. 2026-06-26 11:51 UTCEG score recompute
  38. 2026-06-26 11:51 UTCGHSA enrichment
  39. 2026-06-25 18:16 UTCEG score recompute
  40. 2026-06-25 18:16 UTCGHSA enrichment
  41. 2026-06-25 13:49 UTCEPSS rescore
  42. 2026-06-25 05:16 UTCEG score recompute
  43. 2026-06-25 05:16 UTCGHSA enrichment
  44. 2026-06-24 16:16 UTCEG score recompute
  45. 2026-06-24 16:16 UTCGHSA enrichment
  46. 2026-06-24 14:05 UTCEPSS rescore
  47. 2026-06-24 03:17 UTCEG score recompute
  48. 2026-06-24 03:16 UTCGHSA enrichment
  49. 2026-06-23 21:32 UTCEPSS rescore
  50. 2026-06-23 14:17 UTCEG score recompute
  51. 2026-06-23 14:17 UTCGHSA enrichment
  52. 2026-06-23 01:16 UTCEG score recompute
  53. 2026-06-23 01:16 UTCGHSA enrichment
  54. 2026-06-22 14:25 UTCEPSS rescore
  55. 2026-06-22 14:25 UTCEPSS rescore
  56. 2026-06-22 12:17 UTCEG score recompute
  57. 2026-06-22 12:17 UTCGHSA enrichment
  58. 2026-06-21 23:18 UTCEG score recompute
  59. 2026-06-21 23:18 UTCGHSA enrichment
  60. 2026-06-21 14:56 UTCEPSS rescore
  61. 2026-06-21 14:56 UTCEPSS rescore
  62. 2026-06-21 10:07 UTCEG score recompute
  63. 2026-06-21 10:07 UTCGHSA enrichment
  64. 2026-06-21 01:59 UTCEPSS rescore
  65. 2026-06-21 01:59 UTCEPSS rescore
  66. 2026-06-20 21:09 UTCEG score recompute
  67. 2026-06-20 21:09 UTCGHSA enrichment
  68. 2026-06-20 08:03 UTCEG score recompute
  69. 2026-06-20 08:02 UTCGHSA enrichment
  70. 2026-06-19 19:25 UTCEPSS rescore
  71. 2026-06-19 19:03 UTCEG score recompute▲ 7.30
  72. 2026-06-19 19:03 UTCGHSA enrichment
  73. 2026-06-18 17:52 UTCEPSS rescore
  74. 2026-06-17 17:53 UTCEPSS rescore
  75. 2026-06-16 19:48 UTCNVD updateCVSS v3 → 7.3 · severity → HIGH

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-12318?
CVE-2026-12318 is a high vulnerability published on June 16, 2026. Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
When was CVE-2026-12318 disclosed?
CVE-2026-12318 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12318 actively exploited?
CVE-2026-12318 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12318?
CVE-2026-12318 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12318?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12318, 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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