VulnSocial

CVE-2026-4711Disclosure(mozilla / firefox)

LOWCVSS 9.8 · CRITICAL

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

mozilla CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-416

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

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

  • firefox

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
mozilla
Products
firefox

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-03-24: 2Technical Details · 2026-03-24: 203-24
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • The Hacker Wire@TheHackerWire
    Disclosure

    🔴 CVE-2026-4711 - Critical Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. https://www.thehackerwire.com/vulnerability/CVE-2026-4711/ https://t.co/zltCHmEg8I

    Post summary

    The post announces a critical use‑after‑free vulnerability in the Widget: Cocoa component of Firefox and Thunderbird, affecting specified version ranges.

    0000056
    145 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-4711 Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9. https://www.cve.org/CVERecord?id=CVE-2026-4711

    Post summary

    The text announces a use‑after‑free vulnerability (CVE‑2026‑4711) in Firefox’s Widget Cocoa component, affecting versions below 149 and ESR below 140.9, without any PoC, exploit, patch, or false‑positive information.

    0000093
    56.8K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillafirefox---

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