CVE-2026-119425 (GCVE-0-2026-119425)
Vulnerability from cvelistv5
Published
2026-10-30 11:30
Modified
2026-10-30 15:55
Severity ?
5.3 (Medium) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
5.4 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-290 - Authentication Bypass by Spoofing
Summary
OPNsense core 26.1.6 through 26.7.7 contains an authentication bypass vulnerability in the captive portal roaming feature that lets unauthenticated attackers hijack authorized client sessions by spoofing unauthenticated MAC-to-IP observations. Attackers on the same Layer-2 segment can send forged gratuitous ARP replies binding their IP to a victim's MAC, gaining portal access with traffic attributed to the victim.
References
Impacted products
Vendor Product Version
opnsense core Version: 26.1.6   ≤ 26.7.7
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