VulnSocial

CVE-2026-8963Patch(mozilla / firefox)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Spoofing issue in the Web Speech component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

mozilla CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-290

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • firefox
  • thunderbird

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-05-19); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
mozilla
Products
firefoxthunderbird

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-05-19: 2Mentions · 2026-07-29: 1Patch / Workaround · 2026-05-19: 1Patch / Workaround · 2026-07-29: 1Technical Details · 2026-05-19: 2Technical Details · 2026-07-29: 105-1907-29
Signal classification2 categories
Patch
266.7%
Disclosure
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-05-192
Disclosure1Patch1
2026-07-291
Patch1
Full discourse3 posts
  • Dhafy@DhafyX22
    Patch

    simple code hit 3 browsers (Chrome, Firefox & Safari), resulting in $$$$, two CVEs, and Apple Security Acknowledgment CVE-2026-7935 — Chrome Web Speech API audio spoofing issue. CVE-2026-8963 — Firefox Web Speech API security issue fixed by Mozilla. Safari / WebKit by Apple https://t.co/u8sfIY5T2l

    Post summary

    A simple demo code exposed CVE‑2026‑7935 in Chrome and CVE‑2026‑8963 in Firefox, with Apple acknowledging a WebKit issue; Mozilla has already patched the Firefox bug.

    00042248
    16 followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-8963 Spoofing issue in the Web Speech component. This vulnerability was fixed in Firefox 151 and Thunderbird 151. https://www.cve.org/CVERecord?id=CVE-2026-8963

    Post summary

    The post informs that CVE-2026-8963 is a spoofing flaw in the Web Speech component, and that it is addressed in Firefox 151 and Thunderbird 151, with no PoC or exploit details provided.

    00000158
    57.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-8963 Web Speech Component Spoofing Vulnerability in Firefox Below 151 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-8963

    Post summary

    The text announces a new Web Speech Component spoofing vulnerability affecting Firefox versions below 151, providing only basic classification without further exploitation or mitigation details.

    0000076
    4.0K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillathunderbird---

Explore more

Back to dashboardmozilla CVEsfirefox vulnerabilities