CVE-2026-8947Patch(mozilla / firefox)

LOWCVSS 7.3 · HIGH

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-416CWE-825

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

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 1 observed day

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 2 signals
  • General: 1 classified signal
  • 3 total mentions across 1 day

Affected systems

Vendors
Products
firefoxthunderbird

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-05-19: 3Patch / Workaround · 2026-05-19: 2Technical Details · 2026-05-19: 205-19
Signal classification2 categories
Patch
266.7%
General
133.3%
Referenced assets3 URLs
Full discourse3 posts
  • 株式会社Ikotas Labs@ikotas00
    General

    [News] Firefox 151.0 脆弱性の発見・報告(CVE-2026-8947, CVE-2026-8964) https://ikotaslabs.com/news/2026-05-19?lang=ja

    Post summary

    The article announces the discovery of two CVEs (CVE‑2026‑8947 and CVE‑2026‑8964) affecting Firefox 151.0, but provides no further technical or exploit details.

    0101211.6K
    368 followersView on X
  • Infoflowcloud@infoflowcloud
    Patch

    🚨*CVE* CVE-2026-8947 Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunde… https://www.cve.org/CVERecord?id=CVE-2026-8947 ----- Traducción: CVE-2026-8947 Uso… http://infoflow.cloud`

    Post summary

    The tweet announces that CVE-2026-8947, a Use‑after‑free flaw in WebIDL bindings, has been fixed in specific Firefox and Thunderbird releases, providing patch information but no exploit or active exploitation details.

    0000063
    78 followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-8947 Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunde… https://www.cve.org/CVERecord?id=CVE-2026-8947

    Post summary

    The post announces that CVE‑2026‑8947 is a use‑after‑free vulnerability fixed in recent Mozilla browser releases, with no proof‑of‑concept, exploit or active threat data provided.

    00000211
    57.5K followersView on X
CPE platform detail3 entries

3 of 3 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillafirefox---
Appmozillathunderbird---

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