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

Description

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/NixOS/nixpkgs/security/advisories/GHSA-wc3r-c66x-8xmc
• https://github.com/NixOS/nixpkgs/pull/487775
• https://github.com/NixOS/nixpkgs/pull/487779