Is CVE-2024-4367 in the CISA KEV catalog?

No. CVE-2024-4367 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-4367?

CVE-2024-4367 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2024-4367?

CVE-2024-4367 has an EPSS score of 72.65% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-4367?

Upgrade firefox on debian unstable to 126.0-1 or later. Fixes are available for 38 affected products.

CVE & CISA-KEV Catalog

CVE-2024-4367

HIGHEPSS 99th pctl

8.8

CVSS v3

NVD

Description

A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

CWE-754

How to fix

Remediation Available

firefoxDebian

Fixed in:126.0-1CVE-2024-4367

firefoxRocky

Fixed in:0:115.11.0-1.el7_9.ppc64RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

firefoxRed Hat / RHEL

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9.ppc64RHSA-2024:2881

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

firefox-debuginfoRocky

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9.ppc64RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

firefox-debuginfoRed Hat / RHEL

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9.ppc64RHSA-2024:2881

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2881

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

firefox-debugsourceRed Hat / RHEL

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

firefox-debugsourceRocky

Fixed in:0:115.11.0-1.el8_2RHSA-2024:2882

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2887

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2885

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2886

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3783

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2884

firefox-x11Red Hat / RHEL

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

firefox-x11Rocky

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2883

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2906

thunderbirdRed Hat / RHEL

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2913

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

thunderbirdRocky

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2913

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2913

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

thunderbird-debuginfoRocky

Fixed in:0:115.11.0-1.el7_9RHSA-2024:2913

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

thunderbird-debugsourceRocky

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el8_2RHSA-2024:3338

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_10RHSA-2024:3784

Fixed in:0:115.11.0-1.el8_6RHSA-2024:2912

Fixed in:0:115.11.0-1.el8_4RHSA-2024:2911

Fixed in:0:115.11.0-1.el8_8RHSA-2024:2905

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_4RHSA-2024:2888

Fixed in:0:115.11.0-1.el9_0RHSA-2024:2904

Fixed in:0:115.11.0-1.el9_2RHSA-2024:2903

webkit2gtk3Red Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3Rocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-debuginfoRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-debuginfoRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-debugsourceRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-debugsourceRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-develRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-develRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-devel-debuginfoRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-devel-debuginfoRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jscRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jscRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-debuginfoRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-debuginfoRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-develRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-develRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-devel-debuginfoRocky

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

webkit2gtk3-jsc-devel-debuginfoRed Hat / RHEL

Fixed in:0:2.52.5-1.el8_10RHSA-2026:42088

Fixed in:0:2.52.5-1.el9_8RHSA-2026:42062

firefoxUbuntu

Fixed in:126.0+build2-0ubuntu0.20.04.1USN-6779-1

thunderbirdUbuntu

Fixed in:1:115.11.0+build2-0ubuntu0.20.04.1USN-6782-1

Fixed in:1:115.11.0+build2-0ubuntu0.22.04.1USN-6782-1

Fixed in:1:115.11.0+build2-0ubuntu0.23.10.1USN-6782-1

DeveloperEditionWindows application

Affected:115.11.0Fixed in:115.11.0Mozilla

Affected:126.0Fixed in:126.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:115.11.0Fixed in:115.11.0Mozilla

Affected:126.0Fixed in:126.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:115.11.0Fixed in:115.11.0Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

72.65%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Vendor Advisory3

Issue Tracking1

bugzilla.mozilla.org

Mailing List3

Other references5

Related Vulnerabilities

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CVE-2022-39288	High	7.5	59%	-	Fix
CVE-2023-30591	High	7.5	54%	-	-
CVE-2023-41993	High	8.8	29%	KEV	Fix
CVE-2024-43044	High	8.8	29%	-	Fix
CVE-2024-3393	High	7.5	27%	KEV	Fix
CVE-2021-3560	High	7.8	22%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-12.