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CVE-2024-9396

HIGH
8.8
CVSS Score
Published: October 1, 2024 at 03:13 PM UTC
Updated: June 17, 2026 at 08:24 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

It is currently unknown if this issue is exploitable but a condition may arise where the structured clone of certain objects could lead to memory corruption. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 128.3.0v < 131v < 131.0
Affected range stops below 128.3.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 131, so it looks safe — our inference, not a vendor statement
Affected range stops below 131.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 128.3v < 128.3.0v < 131129.0 ≤ v < 131.0
Affected range stops below 128.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 128.3.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 131, so it looks safe — our inference, not a vendor statement
Affected range stops below 131.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v < 128.3
Affected range stops below 128.3, so it looks safe — our inference, not a vendor statement

References (5)

Issue Tracking
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1912471
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-46/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-47/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-49/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-50/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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