CVE-2026-8957: Vulnerability in Mozilla Firefox
CVE-2026-8957 is a privilege escalation vulnerability in the Enterprise Policies component of Mozilla Firefox. It was fixed in Firefox 151 and Firefox ESR 140.11. The vulnerability has a high severity with a CVSS score of 8.8. Mozilla has officially addressed this issue in their security advisories dated May 19, 2026. No known exploits in the wild have been reported. Users should update to the fixed versions to mitigate this vulnerability.
AI Analysis
Technical Summary
CVE-2026-8957 is a privilege escalation vulnerability affecting the Enterprise Policies component in Mozilla Firefox. This vulnerability allows an attacker to gain elevated privileges within the affected application. The issue was resolved in Firefox 151 and Firefox ESR 140.11. The CVSS v3.1 base score is 8.8, indicating a high impact on confidentiality, integrity, and availability. The vendor advisories from Mozilla confirm the fix and provide detailed references to the underlying bug (Bug 2033850). No cloud service is involved, and no known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox environment, potentially leading to unauthorized actions or access. The CVSS score of 8.8 reflects a high impact on confidentiality, integrity, and availability. However, 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 151 and Firefox ESR 140.11. Users and administrators should apply these updates promptly to remediate the issue. Since the vulnerability is fixed in these versions, no additional mitigation steps are required beyond updating to the patched releases.
CVE-2026-8957: Vulnerability in Mozilla Firefox
Description
CVE-2026-8957 is a privilege escalation vulnerability in the Enterprise Policies component of Mozilla Firefox. It was fixed in Firefox 151 and Firefox ESR 140.11. The vulnerability has a high severity with a CVSS score of 8.8. Mozilla has officially addressed this issue in their security advisories dated May 19, 2026. No known exploits in the wild have been reported. Users should update to the fixed versions to mitigate this vulnerability.
CVSS v3.1
Score 8.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8957 is a privilege escalation vulnerability affecting the Enterprise Policies component in Mozilla Firefox. This vulnerability allows an attacker to gain elevated privileges within the affected application. The issue was resolved in Firefox 151 and Firefox ESR 140.11. The CVSS v3.1 base score is 8.8, indicating a high impact on confidentiality, integrity, and availability. The vendor advisories from Mozilla confirm the fix and provide detailed references to the underlying bug (Bug 2033850). No cloud service is involved, and no known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox environment, potentially leading to unauthorized actions or access. The CVSS score of 8.8 reflects a high impact on confidentiality, integrity, and availability. However, 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 151 and Firefox ESR 140.11. Users and administrators should apply these updates promptly to remediate the issue. Since the vulnerability is fixed in these versions, no additional mitigation steps are required beyond updating to the patched releases.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:29:51.909Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c677bec166c07b0a993e5
Added to database: 05/19/2026, 13:36:59 UTC
Last enriched: 05/26/2026, 20:41:28 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 56
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