CVE-2026-100822: Vulnerability in Mozilla Firefox
Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
AI Analysis
Technical Summary
CVE-2026-100822 is a spoofing vulnerability affecting the Networking: HTTP component in Mozilla Firefox. The flaw could allow an attacker to spoof network communications. Mozilla fixed this vulnerability in Firefox ESR 153.4 and Firefox 157. The vendor advisory categorizes the impact as high and recommends updating to the fixed versions. There is no indication of active exploitation in the wild.
Potential Impact
The vulnerability allows spoofing in the HTTP networking component, which could potentially lead to misleading or deceptive network communications. Mozilla rates the impact as high. There are no reports of known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4 and Firefox 157. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100822: Vulnerability in Mozilla Firefox
Description
Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
Affected software
Mozilla
Firefox
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-100822 is a spoofing vulnerability affecting the Networking: HTTP component in Mozilla Firefox. The flaw could allow an attacker to spoof network communications. Mozilla fixed this vulnerability in Firefox ESR 153.4 and Firefox 157. The vendor advisory categorizes the impact as high and recommends updating to the fixed versions. There is no indication of active exploitation in the wild.
Potential Impact
The vulnerability allows spoofing in the HTTP networking component, which could potentially lead to misleading or deceptive network communications. Mozilla rates the impact as high. There are no reports of known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4 and Firefox 157. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:18:38.463Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"}]
Threat ID: 6abbb3f7f7a7c541066409c2
Added to database: 09/29/2026, 12:49:59 UTC
Last enriched: 09/29/2026, 13:03:16 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 8
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