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Firefox EUVDEUVD-2026-24122

| CVE-2026-6781 HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-04-21 mozilla GHSA-68p2-8vqp-fwx7
Denial Of Service Mozilla Red Hat Suse
High
Disputed · 7.5 NVD
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Severity by source

Sources disagree (Low–High)
NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

8
Patch released
Apr 29, 2026 - 02:30 nvd
Patch available
Analysis Updated
Apr 22, 2026 - 00:32 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 22, 2026 - 00:22 vuln.today
cvss_changed
Analysis Generated
Apr 21, 2026 - 18:24 vuln.today
CVSS changed
Apr 21, 2026 - 18:22 NVD
7.5 (HIGH)
EUVD ID Assigned
Apr 21, 2026 - 13:15 euvd
EUVD-2026-24122
Analysis Generated
Apr 21, 2026 - 13:15 vuln.today
CVE Published
Apr 21, 2026 - 12:41 nvd
HIGH 7.5

DescriptionCVE.org

Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150.

AnalysisAI

Denial-of-service in Firefox versions prior to 150 allows remote attackers to crash the browser via malformed audio/video content during playback. The vulnerability requires no authentication and minimal attack complexity (CVSS 7.5, AV:N/AC:L/PR:N/UI:N), enabling attackers to render the browser unresponsive or terminated through crafted media files. Mozilla has released Firefox 150 to address this issue. EPSS data not available; no evidence of active exploitation (not in CISA KEV), though SSVC assessment notes the vulnerability is not currently being exploited and is classified as non-automatable with partial technical impact.

Technical ContextAI

This vulnerability affects the Audio/Video Playback component in Mozilla Firefox, specifically impacting versions prior to 150 as indicated by the CPE string cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*. The root cause is classified as CWE-400 (Uncontrolled Resource Consumption), suggesting the browser fails to properly validate or limit resources when processing audio/video streams. During media playback, improper handling of malformed or specially crafted multimedia content can exhaust system resources-likely memory, CPU cycles, or internal browser process limits-leading to complete application failure. The Audio/Video subsystem in modern browsers handles multiple codecs, containers, and streaming protocols, and vulnerabilities in parser logic or decoder implementations can allow attackers to trigger resource exhaustion conditions through carefully constructed media files.

RemediationAI

Upgrade to Firefox version 150 or later immediately, as confirmed by Mozilla Security Advisories MFSA2026-30 and MFSA2026-33 available at https://www.mozilla.org/security/advisories/mfsa2026-30/ and https://www.mozilla.org/security/advisories/mfsa2026-33/. Firefox typically auto-updates within 24-48 hours, but administrators should force immediate updates in enterprise environments using Mozilla's deployment tools or group policy mechanisms. If immediate patching is not feasible, implement compensating controls: disable automatic media playback in Firefox preferences (set media.autoplay.default to 5 for block-all mode), restrict access to untrusted multimedia sources through content security policies, and deploy network-layer content filtering to block suspicious media file types at the perimeter. Note that disabling media playback will break legitimate streaming services and embedded video content, significantly impacting user experience. For air-gapped or restricted-update environments, consider deploying Firefox Extended Support Release (ESR) channel which provides longer patch cycles, though this specific fix timeline for ESR is not confirmed in available advisories.

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Same weakness CWE-400 – Uncontrolled Resource Consumption

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CVE-2025-26673 HIGH
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CVE-2025-27469 HIGH
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Same technique Denial Of Service

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CVE-2011-0611 HIGH POC
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CVE-2014-1761 HIGH POC
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Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
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

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EUVD-2026-24122 vulnerability details – vuln.today
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