CVE-2026-2775
Modified Modified - Updated After Analysis

Mitigation Bypass in Firefox HTML Parser Affects Versions

Publication date: 2026-02-24

Last updated on: 2026-06-30

Assigner: Mozilla Corporation

Description
Mitigation bypass in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

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Meta Information

Published
2026-02-24
Last Modified
2026-06-30
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-04
NVD
CVE-2026-2775

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)
mozilla firefox to 115.33.0 (exc)
mozilla firefox From 128.0 (inc) to 140.8.0 (exc)
mozilla thunderbird to 140.8.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-288 The product requires authentication, but the product has an alternate path or channel that does not require authentication.

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Executive Summary

This vulnerability is a mitigation bypass in the DOM: HTML Parser component of Firefox. It affects versions of Firefox earlier than 148, Firefox ESR earlier than 115.33, and Firefox ESR earlier than 140.8.

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