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Mozilla Firefox CVE-2026-8972

| EUVDEUVD-2026-30924 HIGH
Improper Privilege Management (CWE-269)
2026-05-19 mozilla GHSA-96x7-hrvx-gqj6
Mozilla Privilege Escalation Suse Red Hat
High
Disputed · 8.8 NVD
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Severity by source

Sources disagree (Low–High)
NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
3.4 LOW
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
May 20, 2026 - 17:27 vuln.today
Severity Changed
May 20, 2026 - 17:22 NVD
MEDIUM HIGH
CVSS changed
May 20, 2026 - 17:22 NVD
6.5 (MEDIUM) 8.8 (HIGH)
CVE Published
May 19, 2026 - 12:30 nvd
UNKNOWN (no severity yet)

DescriptionCVE.org

Privilege escalation in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 151.

AnalysisAI

Privilege escalation in Mozilla Firefox's WebRTC Audio/Video component allows remote attackers to elevate privileges within the browser context when a user is lured into interacting with a malicious page. The flaw carries a CVSS 8.8 with required user interaction and was addressed in Firefox 151; no public exploit identified at time of analysis and EPSS exploitation probability sits at 0.03% (8th percentile).

Technical ContextAI

The defect lives in Firefox's WebRTC subsystem (cpe:2.3:a:mozilla:firefox), which handles real-time peer-to-peer audio and video streams via the getUserMedia, RTCPeerConnection and related APIs. The root cause class is CWE-269 (Improper Privilege Management), meaning the WebRTC code path fails to correctly enforce the privilege boundary between untrusted web content and a higher-privileged browser capability, letting an attacker perform actions reserved for elevated contexts. Because WebRTC negotiation surfaces complex media pipelines (SDP parsing, ICE candidates, codec handlers) directly to remote origins, errors in privilege checks here are exploitable purely through page content rendered by the renderer process.

RemediationAI

Vendor-released patch: upgrade to Firefox 151 or later, which Mozilla states resolves the WebRTC Audio/Video privilege escalation, per advisories https://www.mozilla.org/security/advisories/mfsa2026-46/ and https://www.mozilla.org/security/advisories/mfsa2026-50/. If immediate patching is blocked, the most targeted compensating control is to disable WebRTC in affected profiles by setting media.peerconnection.enabled=false in about:config - this prevents the vulnerable code path from being reached but will break Jitsi, Google Meet, Microsoft Teams web client, Discord voice and any other browser-based RTC use. Enterprise fleets can additionally restrict the attack surface via the DisabledFeatures policy in policies.json to suppress WebRTC, and pair this with web-filtering rules that block untrusted media-conferencing origins until the browser update is rolled out; see the Bugzilla tracker at https://bugzilla.mozilla.org/show_bug.cgi?id=2033275 for technical confirmation.

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Same weakness CWE-269 – Improper Privilege Management

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CVE-2017-5689 CRITICAL POC
9.8
CVE-2017-12635 CRITICAL POC
9.8
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9.3
CVE-2017-11467 CRITICAL POC
9.8
CVE-2014-1510 CRITICAL POC
9.8
CVE-2014-1511 CRITICAL POC
9.8
CVE-2016-0151 HIGH POC
7.8
CVE-2013-0643 HIGH
8.8

Same technique Privilege Escalation

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CVE-2025-47812 CRITICAL POC
10.0
CVE-2013-0422 CRITICAL POC
9.8
CVE-2013-0632 CRITICAL POC
9.8
CVE-2017-5689 CRITICAL POC
9.8
CVE-2017-12635 CRITICAL POC
9.8
CVE-2016-10372 CRITICAL POC
9.8
CVE-2014-9583 CRITICAL POC
10.0
CVE-2012-0297 CRITICAL POC
10.0

Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed

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CVE-2026-8972 vulnerability details – vuln.today
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