CVE-2026-12310

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
—
EPSS
16.7%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 18, 2026

Advisory Details (5)

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

Security Vulnerabilities fixed in Thunderbird 140.12 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-61/
generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

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

Security Vulnerabilities fixed in Firefox ESR 140.12 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-58/
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=2039707

Vendor Advisories for CVE-2026-12310(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:140.12.0-1.el9_22026-07-15redhat
redhatthunderbird-0:140.12.0-1.el8_42026-07-14redhat
redhatthunderbird-0:140.12.0-1.el8_82026-07-14redhat
redhatthunderbird-0:140.12.0-1.el8_62026-07-14redhat
redhatfirefox-0:140.12.0-1.el7_92026-07-13redhat
redhatthunderbird-0:140.12.0-1.el9_62026-07-13redhat
redhatfirefox-0:140.12.0-1.el9_42026-07-13redhat
redhatthunderbird-0:140.12.0-1.el10_02026-07-13redhat
redhatthunderbird-0:140.12.0-1.el9_42026-07-13redhat
redhatfirefox-0:140.12.0-1.el9_62026-07-09redhat
redhatfirefox-0:140.12.0-1.el8_62026-07-09redhat
redhatfirefox-0:140.12.0-1.el9_22026-07-07redhat
redhatfirefox-0:140.12.0-1.el8_82026-07-07redhat
redhatfirefox-0:140.12.0-1.el8_42026-07-07redhat
redhatfirefox-0:140.12.0-1.el10_02026-07-07redhat
redhatthunderbird-0:140.12.0-1.el8_102026-06-30redhat
redhatthunderbird-0:140.12.0-1.el10_22026-06-29redhat
redhatthunderbird-0:140.12.0-1.el9_82026-06-25redhat
redhatfirefox-0:140.12.0-1.el9_82026-06-22redhat
redhatfirefox-0:140.12.0-1.el10_22026-06-22redhat
redhatfirefox-0:140.12.0-1.el8_102026-06-22redhat

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(4)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 133× 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 155 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-12310?
CVE-2026-12310 is a high vulnerability published on June 16, 2026. Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
When was CVE-2026-12310 disclosed?
CVE-2026-12310 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12310 actively exploited?
CVE-2026-12310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12310?
CVE-2026-12310 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12310?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12310, 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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