CVE-2024-9394

22

FAUCET Score

CVE-2024-9394 is a high-severity vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird, allowing attackers to execute arbitrary JavaScript under the resource://devtools origin via a specially crafted multipart response. This could lead to cross-origin JSON content access, with full cross-origin access possible on Android versions due to limitations in Site Isolation. The vulnerability has a CVSS score of 7.5, indicating a network-based attack with low complexity and high confidentiality impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 131.0CPE matchmatch criteria	cpe:2.3:a:mozilla:firefox::::::::
		< 115.16.0CPE matchmatch criteria	cpe:2.3:a:mozilla:firefox_esr::::::::
		>= 116.0, < 128.3.0CPE matchmatch criteria	cpe:2.3:a:mozilla:firefox_esr::::::::
		< 128.3CPE matchmatch criteria	cpe:2.3:a:mozilla:thunderbird::::::::
		129.0CPE matchmatch criteria	cpe:2.3:a:mozilla:thunderbird:129.0:beta::::::

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

3.9

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.49%

Probability of exploitation in next 30 days

EPSS Percentile

39.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0049 is in the 17th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (30)

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: thunderbird-0:128.3.0-1.el9_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7 Extended Lifecycle SupportFixed in: firefox-0:128.3.0-1.el7_9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: thunderbird-0:128.3.0-1.el8_10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: firefox-0:128.3.0-1.el8_10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: firefox-0:128.3.0-1.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: thunderbird-0:128.3.0-1.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: firefox-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: thunderbird-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: firefox-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: thunderbird-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: firefox-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: thunderbird-0:128.3.0-1.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportFixed in: firefox-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportFixed in: thunderbird-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceFixed in: firefox-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceFixed in: thunderbird-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsFixed in: firefox-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsFixed in: thunderbird-0:128.3.0-1.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: firefox-0:128.3.0-1.el8_8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: thunderbird-0:128.3.1-1.el8_8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: firefox-0:128.3.0-1.el9_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: thunderbird-0:128.3.0-1.el9_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsFixed in: firefox-0:128.3.0-1.el9_0

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsFixed in: thunderbird-0:128.3.0-1.el9_0

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: firefox-0:128.3.0-1.el9_2

mozillavendor investigatingvia nvd_reference

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 10Fixed in: firefox

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 10Fixed in: thunderbird

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: firefox-flatpak-container

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: thunderbird-flatpak-container

Vendor Advisories (1)

redhatCVE-2024-9394Important

firefox: thunderbird: Cross-origin access to JSON contents through multipart responses

References

lists.debian.org / debian-lts-announce/2024/10/msg00004.html

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

bugzilla.mozilla.org / show_bug.cgi

Permissions Required

mozilla.org / security/advisories/mfsa2024-46

Vendor Advisory

mozilla.org / security/advisories/mfsa2024-47

Vendor Advisory

mozilla.org / security/advisories/mfsa2024-48

Vendor Advisory

mozilla.org / security/advisories/mfsa2024-49

Vendor Advisory

mozilla.org / security/advisories/mfsa2024-50

Vendor Advisory