VulnSocial

CVE-2026-2770Disclosure(mozilla / firefox)

LOWCVSS 9.8 · CRITICAL

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

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

mozilla CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

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

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
  • 5 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 5 signals
  • Disclosure: 4 classified signals
  • Peaked 3d ago at 2 mentions (2026-02-25); latest day: 1
  • 5 total mentions across 4 days

Affected systems

Vendors
mozilla
Products
firefoxthunderbird

Deep dive

Activity timeline5 mentions / 4d
01122Mentions · 2026-02-25: 2Mentions · 2026-02-28: 1Mentions · 2026-03-01: 1Mentions · 2026-04-16: 1Patch / Workaround · 2026-04-16: 1Technical Details · 2026-02-25: 2Technical Details · 2026-02-28: 1Technical Details · 2026-03-01: 1Technical Details · 2026-04-16: 102-2502-2803-0104-16
Signal classification2 categories
Disclosure
480.0%
Patch
120.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-252
Disclosure2
2026-02-281
Disclosure1
2026-03-011
Disclosure1
2026-04-161
Patch1
Full discourse5 posts
  • Giuseppe Paternicola@giuseppe_1337
    Patch

    🚨 CRITICAL: CVE-2026-2770 (CVSS 9.8) - Use-after-free in Firefox/Thunderbird DOM bindings. Remote code execution possible. Patch NOW to Firefox 148, ESR 115.33/140.8, Thunderbird 148/140.8. #CVE #PatchNow #ThreatIntel https://t.co/G0japSuJXj

    Post summary

    The tweet announces the critical CVE-2026-2770, a use-after-free flaw in Firefox/Thunderbird that permits remote code execution, and urges users to update to the latest patched releases immediately.

    0000033
    25 followersView on X
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-2770 (CVSS:9.8, CRITICAL) is Modified. Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, ..https://nvd.nist.gov/vuln/detail/CVE-2026-2770 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    The post announces a critical use‑after‑free vulnerability in Firefox’s DOM bindings (CVSS 9.8) with affected versions listed, but provides no PoC, exploit, or patch details.

    0000029
    173 followersView on X
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-2770 (CVSS:9.8, CRITICAL) is Modified. Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, ..https://nvd.nist.gov/vuln/detail/CVE-2026-2770 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    The text announces a critical use‑after‑free vulnerability (CVE‑2026‑2770) affecting older Firefox releases, providing CVSS and affected versions but no patch, PoC, or exploitation details.

    0000045
    173 followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-2770 Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2770 ----- Traducción: CVE-2026-2770 Uso después de liberación en … http://infoflow.cloud`

    Post summary

    The post announces CVE-2026-2770, a use‑after‑free vulnerability in Firefox’s DOM bindings affecting versions below 148 and certain ESR releases.

    0000046
    54 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-2770 Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2770

    Post summary

    The text announces CVE-2026-2770, a use‑after‑free bug in Firefox’s WebIDL bindings affecting versions below 148 and certain ESR releases.

    00000675
    56.6K followersView on X
CPE platform detail4 entries

4 of 4 entries

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

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