CVE-2026-92036

Incorrect boundary conditions in the Networking: HTTP component

Published Sep 15, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-119
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'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Weaknesses CWE-129
Type Values Removed Values Added
Weaknesses CWE-129
Type Values Removed Values Added
Description Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156. Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
References
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 156.
Title Incorrect boundary conditions in the Networking: HTTP component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Sep 21, 2026, 5:17 PM
Reserved
Sep 15, 2026, 12:33 PM
Status
Analyzed
Published
Sep 15, 2026, 1:16 PM
Modified
Oct 5, 2026, 5:58 PM
Severity
Important
Public date
Sep 15, 2026, 12:33 PM