Improper neutralization of input used for LLM prompting in Microsoft Edge and Microsoft Edge for iOS - CVE-2026-70331
Published: August 31, 2026
Vulnerability identifier: #VU146315
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-70331
CWE-ID:
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a spoofing attack.
The vulnerability exists due to improper input validation when handling LLM prompts. A remote attacker can trick perform spoofing attack.
Affected software
Microsoft Edge
Microsoft Edge for iOS
Microsoft Edge for iOS
How to mitigate CVE-2026-70331
Install updates from vendor's website.
Microsoft Edge - update to 150.0.4078.50
Microsoft Edge for iOS - update to 150.0.4078.50
Microsoft Edge for iOS - update to 150.0.4078.50