CVE-2026-12318

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM 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
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 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(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
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 (2:3.120-1ubuntu2.1) @ resolute2026-09-14ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
nss2:3.61-1 ... 2:3.61-1+deb11u5 (6 versions)2:3.61-1+deb11u6—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nss2:3.87.1-1, 2:3.87.1-1+deb12u1, 2:3.87.1-1+deb12u22:3.87.1-1+deb12u3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nss2:3.110-1, 2:3.110-1+deb13u1, 2:3.110-1+deb13u22:3.110-1+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nss2:3.110-1 ... 2:3.123.1-1 (11 versions)2:3.124-1—

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 9× in last 7d / 52× 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 288 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 81.7% of all scored CVEs.
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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12318

Explore →

Is Your Infrastructure Affected by CVE-2026-12318?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs