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CVE-2026-8966

⚠️ high
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Summary

Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

CVSS Score
7.5
High
EPSS Score
0.3
Exploit Probability
Published Date
2026-05-19
First Seen: 2026-05-20
📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 67.8% of all 360,673 vulnerabilities in our database.

#116,318
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 20, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Partial
Limited system impact
🏆 Discovered By
Rintaro Kobayashi
SSVC data provided by CISA
Last Modified 2026-07-23
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE IDs (Weakness Types)
CWE-200

📦 Affected Products 2

Vendor Product Status Affected Versions
mozilla firefox Affected
< 151.0.0
mozilla thunderbird Affected
< 151.0.0

🔗 References 3

https://bugzilla.mozilla.org/show_bug.cgi?id=2025849
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026...
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-84118 🔶 medium 5.4 0.2 Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderb... 2026-09-01
CVE-2026-84119 ⛔ critical 9.6 0.3 Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Fire... 2026-09-01
CVE-2026-84120 🔶 medium 5.4 0.2 Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ES... 2026-09-01
CVE-2026-84121 ⛔ critical 9.6 0.3 Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefo... 2026-09-01
CVE-2026-84122 🔶 medium 5.4 0.2 Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ES... 2026-09-01
CVE-2026-84123 ⚠️ high 8.8 0.2 Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 15... 2026-09-01
These CVEs affect the same products