{"aliases":["GHSA-2ph8-5cr8-hr33"],"categories":["format-injection"],"crate":"webbrowser","cves":[],"cvss":0.0,"database_specific":{"severity":""},"date":"2026-07-29","deb_packages":[{"crate_name":null,"deb_name":"tree-sitter-cli","version":"0.26.11-1"}],"description":"On Unix platforms handled by `src/unix.rs`, affected versions substitute the\ncaller-supplied URL into the `BROWSER` environment-variable template before\ntokenizing the resulting string with `split_ascii_whitespace()`. If an\napplication passes an attacker-controlled non-HTTP(S) URL whose parsed form\nretains spaces and the effective `BROWSER` template contains `%s`, text that\nshould remain within one URL argument becomes additional browser arguments.\n\nThe issue was reproduced with Chromium by injecting\n`--remote-debugging-port`, which exposed a local DevTools endpoint, and\n`--proxy-server`, which redirected browser traffic through an\nattacker-controlled proxy. The available arguments and resulting impact depend\non the browser launched by the affected application.\n\nVersion 1.2.2 fixes the issue by tokenizing the `BROWSER` template before\nsubstituting the URL, preserving the URL as part of a single argument. Users\nshould upgrade to version 1.2.2 or later. Applications that only need HTTP(S)\nURLs can also enable the crate's `hardened` feature as defense in depth.\n\nThis issue was reported by\n[@dywzju09-blip](https://github.com/dywzju09-blip).","id":"RUSTSEC-2026-0257","keywords":["argument-injection","browser","unix"],"patched_versions":[">=1.2.2"],"source":"debian_rustsec","title":"Unix `BROWSER` handling allows browser argument injection","url":"https://github.com/amodm/webbrowser-rs/commit/31d1b924885551c0e553909d27c738ca6958a0f3"}