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CVE-2026-6780— Denial-of-service in the Audio/Video: Playback component

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox 150之前版本和Mozilla Thunderbird 150之前版本存在安全漏洞，该漏洞源于Audio/Video: Playbac

AI Predicted 6.1 Difficulty: Moderate EPSS 0.29% · P22

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Mozilla Firefox 150≤ * unaffected
Mozilla Thunderbird 150≤ * unaffected
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I. Basic Information for CVE-2026-6780

Vulnerability Information
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Vulnerability Title
Denial-of-service in the Audio/Video: Playback component
Source: CVE Program / CVE List V5
Vulnerability Description
Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox和Mozilla Thunderbird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox 150之前版本和Mozilla Thunderbird 150之前版本存在安全漏洞，该漏洞源于Audio/Video: Playbac
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 150 ~ * -
Mozilla Thunderbird 150 ~ * -

II. Public POCs for CVE-2026-6780

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III. Intelligence Information for CVE-2026-6780

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Vendor Advisories for CVE-2026-6780 (2)

Same Patch Batch · Mozilla · 2026-04-21 · 41 CVEs total

CVE-2026-6777 Other issue in the Networking: DNS component
CVE-2026-6766 Incorrect boundary conditions in the Libraries component in NSS
CVE-2026-6768 Mitigation bypass in the Networking: Cookies component
CVE-2026-6769 Privilege escalation in the Debugger component
CVE-2026-6770 Other issue in the Storage: IndexedDB component
CVE-2026-6771 Mitigation bypass in the DOM: Security component
CVE-2026-6772 Incorrect boundary conditions in the Libraries component in NSS
CVE-2026-6773 Denial-of-service due to integer overflow in the Graphics: WebGPU component
CVE-2026-6774 Mitigation bypass in the DOM: Security component
CVE-2026-6775 Incorrect boundary conditions in the WebRTC component
CVE-2026-6767 Other issue in the Libraries component in NSS
CVE-2026-6776 Incorrect boundary conditions in the WebRTC: Networking component
CVE-2026-6778 Invalid pointer in the Audio/Video: Playback component
CVE-2026-6779 Other issue in the JavaScript Engine component
CVE-2026-6781 Denial-of-service in the Audio/Video: Playback component
CVE-2026-6783 Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component
CVE-2026-6782 Information disclosure in the IP Protection component
CVE-2026-6784 Memory safety bugs fixed in Firefox 150 and Thunderbird 150
CVE-2026-6785 Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10
CVE-2026-6786 Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Th

Showing top 20 of 41 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-6780

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