CVE-2026-25740 MEDIUM

CVE-2026-25740: Privilege escalation to the `CAP_NET_RAW` capability via the `programs.captive-browser` NixOS module

Vendor Nixos
Product nixpkgs
Weakness CWE-250
Published February 9, 2026
Last update February 10, 2026
View on NVD All CVEs

CVSS base score

5.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

captive browser, a dedicated Chrome instance to log into captive portals without messing with DNS settings. In 25.05 and earlier, when programs.captive-browser is enabled, any user of the system can run arbitrary commands with the CAP_NET_RAW capability (binding to privileged ports, spoofing localhost traffic from privileged services...). This vulnerability is fixed in 25.11 and 26.05.

Key dates

02Disclosure timeline

February 9, 2026 CVE published
February 10, 2026 Record updated