CVE-2026-4705 - Vulnerability Analysis

Overview

Firefox < 149 and Firefox ESR < 140.9 contain an undefined behavior vulnerability in the WebRTC: Signaling component, letting attackers potentially cause unexpected behavior, exploit requires no special conditions.

Severity & Score

Impact

Attackers can cause undefined behavior in the WebRTC signaling component, potentially leading to application instability or other unknown impacts.

Mitigation

Update to Firefox 149, Firefox ESR 140.9 or later.

References

• https://www.mozilla.org/security/advisories/mfsa2026-20/
• https://www.mozilla.org/security/advisories/mfsa2026-22/
• https://www.mozilla.org/security/advisories/mfsa2026-23/
• https://www.mozilla.org/security/advisories/mfsa2026-24/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2014873

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 24, 2026

🔴 CVE-2026-4705 - Critical (9.8) 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/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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