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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/NixOS/nixpkgs/security/advisories/GHSA-wc3r-c66x-8xmc
Issue Tracking x_refsource_misc
https://github.com/NixOS/nixpkgs/pull/487775
Issue Tracking x_refsource_misc
https://github.com/NixOS/nixpkgs/pull/487779
Scores
CVSS v4
5.8
EPSS
0.0015
EPSS Percentile
4.3%
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
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-250
Status
published
Products (1)
NixOS/nixpkgs
<= 25.05
Published
Feb 09, 2026
Tracked Since
Feb 18, 2026