VulnSocial

CVE-2026-4705Patch(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

Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

mozilla CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-758

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

Threat summary

  • Patch or workaround signal is available
  • 4 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 4 signals
  • General: 1 classified signal
  • Disclosure: 1 classified signal
  • Peaked 3d ago at 1 mentions (2026-03-24); latest day: 1
  • 4 total mentions across 4 days

Affected systems

Vendors
mozilla
Products
firefox

Deep dive

Activity timeline4 mentions / 4d
00111Mentions · 2026-03-24: 1Mentions · 2026-03-25: 1Mentions · 2026-03-26: 1Mentions · 2026-04-17: 1Patch / Workaround · 2026-03-26: 1Patch / Workaround · 2026-04-17: 1Technical Details · 2026-03-24: 1Technical Details · 2026-03-25: 1Technical Details · 2026-03-26: 1Technical Details · 2026-04-17: 103-2403-2503-2604-17
Signal classification3 categories
Patch
250.0%
General
125.0%
Disclosure
125.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-03-241
General1
2026-03-251
Disclosure1
2026-03-261
Patch1
2026-04-171
Patch1
Full discourse4 posts
  • Giuseppe Paternicola@giuseppe_1337
    Patch

    🚨 CRITICAL: CVE-2026-4705 (CVSS 9.8) Undefined behavior in Firefox/Thunderbird WebRTC Signaling component. Network exploitable, no user interaction required. Patched in Firefox 149, ESR 140.9, Thunderbird 149/140.9. #CVE #PatchNow #ThreatIntel https://t.co/cvBue3tbG2

    Post summary

    The tweet highlights a critical CVE-2026-4705 affecting Firefox/Thunderbird’s WebRTC component, notes its network‑level exploitability, and provides patch details for the latest versions.

    0000052
    25 followersView on X
  • ThreatCluster@threatcluster
    Patch

    BREAKING: Mozilla patches 3 critical flaws CVE-2026-4720, CVE-2026-4710, CVE-2026-4705 in Firefox and Thunderbird enabling remote code execution without user interaction, update to 149 now. https://threatcluster.io/cluster/critical-vulnerabilities-in-firefox-and-thunderbird-require--8405388c

    Post summary

    Mozilla released patch 149 addressing three critical remote code execution bugs (CVE-2026-4720, CVE-2026-4710, CVE-2026-4705) in Firefox and Thunderbird.

    0000076
    115 followersView on X
  • The Hacker Wire@TheHackerWire
    Disclosure

    🔴 CVE-2026-4705 - Critical Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. https://www.thehackerwire.com/vulnerability/CVE-2026-4705/ https://t.co/a8AIDzLCsB

    Post summary

    The post announces CVE-2026-4705, a critical undefined behavior in WebRTC signaling affecting Firefox and Thunderbird versions, with no mention of PoC, exploit, or patch.

    0000084
    145 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-4705 Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9. https://www.cve.org/CVERecord?id=CVE-2026-4705

    Post summary

    The snippet simply reports a CVE for an undefined behavior in WebRTC affecting certain Firefox versions, offering no PoC, exploit, patch, or evidence of active exploitation.

    00000108
    56.8K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appmozillafirefox---
Appmozillafirefox---

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