CVE-2026-7323

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-04-28. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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.

Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
29.7%
KEV
Not listed

Published

April 28, 2026

Last Modified

July 15, 2026

Advisory Details (5)

Auto-updated Apr 30, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 140.10.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-39/
generic

Security Vulnerabilities fixed in Thunderbird 150.0.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-38/
generic

Security Vulnerabilities fixed in Firefox ESR 140.10.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-36/
generic

Security Vulnerabilities fixed in Firefox 150.0.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-35/
generic

Client Challenge

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028537%2C2029911%2C2031121%2C2033602

Vendor Advisories for CVE-2026-7323(20)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:140.10.1-1.el8_62026-06-10redhat
redhatthunderbird-0:140.10.1-1.el8_42026-06-09redhat
redhatthunderbird-0:140.10.1-1.el10_02026-06-09redhat
redhatthunderbird-0:140.10.1-1.el8_82026-06-09redhat
redhatthunderbird-0:140.10.1-1.el9_22026-06-09redhat
redhatthunderbird-0:140.10.1-1.el9_42026-06-09redhat
redhatthunderbird-0:140.10.1-1.el9_62026-06-09redhat
redhatfirefox-0:140.10.1-1.el8_62026-06-08redhat
redhatfirefox-0:140.10.1-1.el8_82026-06-03redhat
redhatfirefox-0:140.10.1-1.el8_42026-06-03redhat
redhatfirefox-0:140.10.1-1.el7_92026-06-03redhat
redhatfirefox-0:140.10.1-1.el10_02026-06-02redhat
redhatfirefox-0:140.10.1-1.el9_62026-06-02redhat
redhatfirefox-0:140.10.1-1.el9_22026-06-02redhat
redhatfirefox-0:140.10.1-1.el9_42026-06-01redhat
redhatfirefox-0:140.10.1-1.el9_02026-05-28redhat
redhatthunderbird-0:140.10.1-1.el8_102026-05-26redhat
redhatfirefox-0:140.10.1-1.el8_102026-05-20redhat
redhatfirefox-0:140.10.1-1.el9_82026-05-19redhat
redhatthunderbird-0:140.10.1-1.el10_22026-05-19redhat
redhatthunderbird-0:140.10.1-1.el9_82026-05-19redhat
redhatfirefox-0:140.10.1-1.el10_22026-05-19redhat

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.

Additional Vendor Advisories

(2)

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 9× in last 7d / 40× 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 140 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-7323?
CVE-2026-7323 is a high vulnerability published on April 28, 2026. Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR…
When was CVE-2026-7323 disclosed?
CVE-2026-7323 was first published in the National Vulnerability Database on April 28, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7323 actively exploited?
CVE-2026-7323 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7323?
CVE-2026-7323 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-7323?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7323, 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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