CVE-2024-4778

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Memory safety bugs present in Firefox 125. 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 affects Firefox < 126.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
35.5%
KEV
Not listed

Published

May 14, 2024

Last Modified

April 4, 2025

Advisory Details (2)

Auto-updated May 27, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Firefox 126 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-21/
generic

Client Challenge

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1838834%2C1889291%2C1889595%2C1890204%2C1891545

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-mozsymbols (126.0+build2-0ubuntu0.20.04.1) @ focal2026-05-24ubuntu

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

(2)

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 8× in last 7d / 41× 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. 2026-07-11 08:26 UTCEPSS rescore
  2. 2026-07-09 19:09 UTCEPSS rescore
  3. 2026-07-09 19:09 UTCEPSS rescore
  4. 2026-07-08 15:14 UTCEPSS rescore
  5. 2026-07-07 13:45 UTCEPSS rescore
  6. 2026-07-06 16:26 UTCEPSS rescore
  7. 2026-07-06 02:22 UTCEPSS rescore
  8. 2026-07-05 02:29 UTCEPSS rescore
  9. 2026-07-04 06:30 UTCEPSS rescore
  10. 2026-07-01 15:05 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
  12. 2026-06-29 14:05 UTCEPSS rescore
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 04:55 UTCEPSS rescore
  15. 2026-06-28 04:55 UTCEPSS rescore
  16. 2026-06-27 03:07 UTCEPSS rescore
  17. 2026-06-27 03:07 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-24 14:04 UTCEPSS rescore
  20. 2026-06-24 14:04 UTCEPSS rescore
  21. 2026-06-23 21:32 UTCEPSS rescore
  22. 2026-06-23 21:32 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
Show 52 more
  1. 2026-06-21 01:59 UTCEPSS rescore
  2. 2026-06-21 01:58 UTCEPSS rescore
  3. 2026-06-19 19:25 UTCEPSS rescore
  4. 2026-06-18 17:52 UTCEPSS rescore
  5. 2026-06-18 17:52 UTCEPSS rescore
  6. 2026-06-17 17:52 UTCEPSS rescore
  7. 2026-06-17 17:52 UTCEPSS rescore
  8. 2026-06-16 17:52 UTCEPSS rescore
  9. 2026-06-16 17:52 UTCEPSS rescore
  10. 2026-06-15 17:47 UTCEPSS rescore
  11. 2026-06-14 23:17 UTCEPSS rescore
  12. 2026-06-13 22:59 UTCEPSS rescore
  13. 2026-06-13 22:59 UTCEPSS rescore
  14. 2026-06-13 22:59 UTCEPSS rescore
  15. 2026-06-12 23:11 UTCEPSS rescore
  16. 2026-06-12 23:11 UTCEPSS rescore
  17. 2026-06-11 13:59 UTCEPSS rescore
  18. 2026-06-10 22:18 UTCEPSS rescore
  19. 2026-06-10 13:21 UTCEPSS rescore
  20. 2026-06-08 14:16 UTCEPSS rescore
  21. 2026-06-08 14:16 UTCEPSS rescore
  22. 2026-06-07 15:24 UTCEPSS rescore
  23. 2026-06-07 15:24 UTCEPSS rescore
  24. 2026-06-06 13:46 UTCEPSS rescore
  25. 2026-06-06 13:46 UTCEPSS rescore
  26. 2026-06-05 22:46 UTCEPSS rescore
  27. 2026-06-05 22:46 UTCEPSS rescore
  28. 2026-06-05 06:09 UTCEPSS rescore
  29. 2026-06-05 06:09 UTCEPSS rescore
  30. 2026-06-04 13:11 UTCEPSS rescore
  31. 2026-06-04 13:11 UTCEPSS rescore
  32. 2026-06-02 20:12 UTCEPSS rescore
  33. 2026-06-01 13:51 UTCEPSS rescore
  34. 2026-06-01 13:51 UTCEPSS rescore
  35. 2026-05-31 22:30 UTCEPSS rescore
  36. 2026-05-31 22:30 UTCEPSS rescore
  37. 2026-05-31 00:16 UTCEPSS rescore
  38. 2026-05-31 00:16 UTCEPSS rescore
  39. 2026-05-29 13:43 UTCEPSS rescore
  40. 2026-05-28 13:44 UTCEPSS rescore
  41. 2026-05-28 13:44 UTCEPSS rescore
  42. 2026-05-28 13:44 UTCEPSS rescore
  43. 2026-05-27 13:40 UTCEPSS rescore
  44. 2026-05-27 13:40 UTCEPSS rescore
  45. 2026-05-26 13:43 UTCEPSS rescore
  46. 2026-05-26 13:43 UTCEPSS rescore
  47. 2026-05-26 07:18 UTCEPSS rescore
  48. 2026-05-26 07:18 UTCEPSS rescore
  49. 2026-05-26 07:18 UTCEPSS rescore
  50. 2026-05-24 02:12 UTCEG score recompute
  51. 2026-05-24 02:12 UTCVendor advisory
  52. 2026-05-24 02:12 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2024-4778?
CVE-2024-4778 is a critical vulnerability published on May 14, 2024. Memory safety bugs present in Firefox 125. 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 affects Firefox < 126.
When was CVE-2024-4778 disclosed?
CVE-2024-4778 was first published in the National Vulnerability Database on May 14, 2024, with the most recent update on April 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-4778 actively exploited?
CVE-2024-4778 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-4778?
CVE-2024-4778 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-4778?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-4778, 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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