Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

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.

No EPSS score available.

Key SSVC decision points have not yet been added.

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
115.45 unaffected ≤ 115.*
153.7 unaffected ≤ 153.*
160 unaffected ≤ *
Mozilla Thunderbird affected
Version Status Constraints
153.7 unaffected ≤ 153.*
160 unaffected ≤ *

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2081980 cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-125/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-126/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-127/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-128/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-129/ cve-icon cve-icon
History

Tue, 10 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Description Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, and Thunderbird 160. Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
References

Tue, 10 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
Description Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7. Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, and Thunderbird 160.
References

Tue, 10 Nov 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics 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'}

Tue, 10 Nov 2026 13:45:00 +0000

Type Values Removed Values Added
Description Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
Title Use-after-free in the CSS Parsing and Computation component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-11-10T20:24:21.395Z

Reserved: 2026-11-09T14:46:05.759Z

Link: CVE-2026-124881

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-10T14:17:21.057

Modified: 2026-11-10T21:19:13.357

Link: CVE-2026-124881

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses