CVE-2024-9401

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-10-01. 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: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. 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 < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
50.6%
KEV
Not listed

Published

October 1, 2024

Last Modified

November 3, 2025

Advisory Details (7)

Auto-updated Jun 22, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 3916-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2024/10/msg00006.html
generic

Security Vulnerabilities fixed in Thunderbird 131 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-50/
generic

Security Vulnerabilities fixed in Thunderbird 128.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-49/
generic

Security Vulnerabilities fixed in Firefox ESR 115.16 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-48/
generic

Security Vulnerabilities fixed in Firefox ESR 128.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-47/
generic

Security Vulnerabilities fixed in Firefox 131 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-46/
generic

Client Challenge

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1872744%2C1897792%2C1911317%2C1916476

Vendor Advisories for CVE-2024-9401(9)

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

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-mozsymbols (131.0+build1.1-0ubuntu0.20.04.1) @ focal2026-05-23ubuntu
redhatthunderbird-0:128.3.1-1.el8_82024-10-16redhat
redhatthunderbird-0:128.3.0-1.el8_62024-10-16redhat
redhatfirefox-0:128.3.0-1.el8_82024-10-09redhat
redhatthunderbird-0:128.3.0-1.el9_22024-10-09redhat
redhatthunderbird-0:128.3.0-1.el8_22024-10-09redhat
redhatthunderbird-0:128.3.0-1.el9_02024-10-09redhat
redhatthunderbird-0:128.3.0-1.el8_42024-10-09redhat
redhatfirefox-0:128.3.0-1.el7_92024-10-07redhat
redhatfirefox-0:128.3.0-1.el8_62024-10-07redhat
redhatthunderbird-0:128.3.0-1.el8_102024-10-07redhat
redhatfirefox-0:128.3.0-1.el8_102024-10-07redhat
redhatfirefox-0:128.3.0-1.el8_42024-10-07redhat
redhatfirefox-0:128.3.0-1.el8_22024-10-03redhat
redhatfirefox-0:128.3.0-1.el9_02024-10-03redhat
redhatfirefox-0:128.3.0-1.el9_22024-10-03redhat
redhatthunderbird-0:128.3.0-1.el9_42024-10-02redhat
redhatfirefox-0:128.3.0-1.el9_42024-10-02redhat

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.

Additional Vendor Advisories

(9)

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 / 48× 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 107 total refreshes for this CVE.

  1. 2026-07-23 14:17 UTCEPSS rescore
  2. 2026-07-23 02:47 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
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  46. 2026-06-08 14:16 UTCEPSS rescore
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  48. 2026-06-08 11:15 UTCOSV refresh
  49. 2026-06-07 15:24 UTCEPSS rescore
  50. 2026-06-06 13:47 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-9401?
CVE-2024-9401 is a critical vulnerability published on October 1, 2024. Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. 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 <…
When was CVE-2024-9401 disclosed?
CVE-2024-9401 was first published in the National Vulnerability Database on October 1, 2024, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-9401 actively exploited?
CVE-2024-9401 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-9401?
CVE-2024-9401 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-9401?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-9401, 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

Explore the affected products and dependency analysis for CVE-2024-9401

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