CVE-2024-8381

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-09-03. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the with environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Track)
EG Risk 75/100SSVC: 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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
90.3%
KEV
Not listed

Published

September 3, 2024

Last Modified

November 4, 2025

Advisory Details (8)

Auto-updated Jun 6, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 3882-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2024/09/msg00025.html
generic Patch Available

[SECURITY] [DLA 3869-1] firefox-esr security update

https://lists.debian.org/debian-lts-announce/2024/09/msg00012.html
generic

Security Vulnerabilities fixed in Thunderbird 115.15 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-44/
generic

Security Vulnerabilities fixed in Thunderbird 128.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-43/
generic

Security Vulnerabilities fixed in Firefox ESR 115.15 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-41/
generic

Security Vulnerabilities fixed in Firefox ESR 128.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-40/
generic

Security Vulnerabilities fixed in Firefox 130 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2024-39/
generic

1912715 - (CVE-2024-8381) Assertion failure: this->is<T>(), at js/src/gc/Cell.h:193

https://bugzilla.mozilla.org/show_bug.cgi?id=1912715

Patch Availability(19)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-mozsymbols (130.0+build2-0ubuntu0.20.04.1) @ focal2026-05-23ubuntu
ubuntuxul-ext-lightning (1:115.15.0+build1-0ubuntu0.22.04.1) @ jammy2026-05-23ubuntu
redhatfirefox-0:128.2.0-1.el8_62024-09-19redhat
redhatfirefox-0:128.2.0-1.el8_22024-09-19redhat
redhatthunderbird-0:128.2.0-1.el8_62024-09-19redhat
redhatfirefox-0:128.2.0-1.el7_92024-09-19redhat
redhatfirefox-0:128.2.0-1.el8_42024-09-19redhat
redhatfirefox-0:128.2.0-1.el8_82024-09-19redhat
redhatfirefox-0:128.2.0-1.el9_02024-09-18redhat
redhatfirefox-0:128.2.0-1.el9_22024-09-18redhat
redhatthunderbird-0:128.2.0-1.el9_02024-09-17redhat
redhatthunderbird-0:128.2.0-1.el8_42024-09-17redhat
redhatthunderbird-0:128.2.0-1.el8_22024-09-17redhat
redhatthunderbird-0:128.2.0-1.el8_82024-09-17redhat
redhatthunderbird-0:128.2.0-1.el9_22024-09-17redhat
redhatthunderbird-0:128.2.0-1.el9_42024-09-16redhat
redhatfirefox-0:128.2.0-1.el8_102024-09-16redhat
redhatthunderbird-0:128.2.0-1.el8_102024-09-16redhat
redhatfirefox-0:128.2.0-1.el9_42024-09-16redhat

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

(19)

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 11× 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 104 total refreshes for this CVE.

  1. 2026-07-23 14:17 UTCEPSS rescore
  2. 2026-07-23 02:46 UTCEG score recompute
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCbjrjk/CVE-2024-8381
    First seen Jan 30, 2025

    CVE-2024-8381: A SpiderMonkey Interpreter Type Confusion Bug.

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-8381?
CVE-2024-8381 is a critical vulnerability published on September 3, 2024. A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the with environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.
When was CVE-2024-8381 disclosed?
CVE-2024-8381 was first published in the National Vulnerability Database on September 3, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-8381 actively exploited?
CVE-2024-8381 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-8381?
CVE-2024-8381 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-8381?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-8381, 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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