CVE-2026-92024 - Vulnerability Details

Description

Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Published: 2026-09-15

Score: 8.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

Use-after-free in the SVG component corrupts memory after an attacker triggers a crash, thereby potentially compromising the confidentiality, integrity, and availability of the affected application.

Affected Systems

Mozilla Firefox (all releases prior to 156 and the ESR branches 115.41, 140.16 and 153.3) and Mozilla Thunderbird (all releases prior to 156 and the ESR branches 140.16 and 153.3) are affected.

Risk and Exploitability

The vulnerability is not listed in CISA KEV and has an EPSS score of < 1%, indicating a very low likelihood of exploitation. The CVSS score of 8.8 indicates high severity. Although no public exploits are known, the potential for code execution remains and the modest exploitation probability warrants prompt remediation.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mozilla

Firefox

affected

Version	Status	Constraints
`115.41`	unaffected	≤ 115.*
`140.16`	unaffected	≤ 140.*
`153.3`	unaffected	≤ 153.*
`156`	unaffected	≤ *

Mozilla

Thunderbird

affected

Version	Status	Constraints
`140.16`	unaffected	≤ 140.*
`153.3`	unaffected	≤ 153.*
`156`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Mozilla

Firefox

100%

Version	Status	Scheme	Platform
`[115.41,116.0.0)`	unaffected	generic	—
`[140.16,141.0.0)`	unaffected	generic	—
`[153.3,154.0.0)`	unaffected	generic	—
`[156,*]`	unaffected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update Mozilla Firefox to 156 or newer or to ESR 115.41, 140.16, or 153.3.
Update Thunderbird to 156 or newer or to ESR 140.16 or ESR 153.3.
If immediate upgrade is not possible, disable SVG rendering (e.g., set svg.disabled=true in about:config or equivalent mail-client setting).

Generated by OpenCVE AI on September 20, 2026 at 17:58 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4781-1	firefox-esr security update
Debian DLA	DLA-4782-1	thunderbird security update
Debian DSA	DSA-6501-1	firefox-esr security update
Debian DSA	DSA-6503-1	thunderbird security update

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0034.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2068354
https://nvd.nist.gov/vuln/detail/CVE-2026-92024
https://www.cve.org/CVERecord?id=CVE-2026-92024
https://www.mozilla.org/security/advisories/mfsa2026-90/
https://www.mozilla.org/security/advisories/mfsa2026-91/
https://www.mozilla.org/security/advisories/mfsa2026-92/
https://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92024
https://www.mozilla.org/security/advisories/mfsa2026-93/
https://www.mozilla.org/security/advisories/mfsa2026-94/
https://www.mozilla.org/security/advisories/mfsa2026-95/
https://www.mozilla.org/security/advisories/mfsa2026-95/#CVE-2026-92024
https://www.mozilla.org/security/advisories/mfsa2026-96/

History

Sun, 20 Sep 2026 01:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416
Metrics	cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}` cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}`

Thu, 17 Sep 2026 20:30:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-416

Thu, 17 Sep 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-825
References		https://nvd.nist.gov/vuln/detail/CVE-2026-92024 https://www.cve.org/CVERecord?id=CVE-2026-92024 https://www.mozilla.org/security/advisories/mfsa2026-92/#CVE-2026-92024 https://www.mozilla.org/security/advisories/mfsa2026-95/#CVE-2026-92024
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}` threat_severity `Important`

Wed, 16 Sep 2026 14:45:00 +0000

Type	Values Removed	Values Added
Description	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
References		https://www.mozilla.org/security/advisories/mfsa2026-96/

Wed, 16 Sep 2026 04:45:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416

Tue, 15 Sep 2026 20:15:00 +0000

Type	Values Removed	Values Added
Description	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, and Thunderbird 140.16.	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
References		https://www.mozilla.org/security/advisories/mfsa2026-94/

Tue, 15 Sep 2026 20:00:00 +0000

Type	Values Removed	Values Added
Description	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.	Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, and Thunderbird 140.16.
References		https://www.mozilla.org/security/advisories/mfsa2026-95/

Tue, 15 Sep 2026 15:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mozilla Mozilla firefox
Vendors & Products		Mozilla Mozilla firefox

Tue, 15 Sep 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
Title		Use-after-free in the SVG component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2068354 https://www.mozilla.org/security/advisories/mfsa2026-90/ https://www.mozilla.org/security/advisories/mfsa2026-91/ https://www.mozilla.org/security/advisories/mfsa2026-92/ https://www.mozilla.org/security/advisories/mfsa2026-93/

Subscriptions

Mozilla Firefox

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-09-15T12:33:44.665Z

Updated: 2026-09-20T00:18:04.098Z

Reserved: 2026-09-15T12:33:44.136Z

Link: CVE-2026-92024

Vulnrichment

Updated: 2026-09-20T00:17:56.226Z

NVD

Status : Awaiting Analysis

Published: 2026-09-15T13:16:52.620

Modified: 2026-09-20T01:16:35.393

Link: CVE-2026-92024

Redhat

Severity : Important

Publid Date: 2026-09-15T12:33:44Z

Links: CVE-2026-92024 - Bugzilla

OpenCVE Enrichment

Updated: 2026-09-20T18:00:14Z

Weaknesses

CWE-416
Use After Free
CWE-825
Expired Pointer Dereference

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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