Security: disable sandbox container --no-sandbox by default (#22451)

CHANGELOG.md

@@ -111,6 +111,7 @@ Docs: https://docs.openclaw.ai
 - Security/Dependencies: bump transitive `hono` usage to `4.11.10` to incorporate timing-safe authentication comparison hardening for `basicAuth`/`bearerAuth` (`GHSA-gq3j-xvxp-8hrf`). Thanks @vincentkoc.
 - Security/Gateway: parse `X-Forwarded-For` with trust-preserving semantics when requests come from configured trusted proxies, preventing proxy-chain spoofing from influencing client IP classification and rate-limit identity. Thanks @AnthonyDiSanti and @vincentkoc.
 - iOS/Gateway/Tools: prefer uniquely connected node matches when duplicate display names exist, surface actionable `nodes invoke` pairing-required guidance with request IDs, and refresh active iOS gateway registration after location-capability setting changes so capability updates apply immediately. (#22120) thanks @mbelinky.
+- Security/Sandbox: remove default `--no-sandbox` for the browser container entrypoint, add explicit opt-in via `OPENCLAW_BROWSER_NO_SANDBOX` / `CLAWDBOT_BROWSER_NO_SANDBOX`, and harden the default container security posture (`GHSA-43x4-g22p-3hrq`). Thanks @TerminalsandCoffee and @vincentkoc.
 
 ## 2026.2.19
 

scripts/sandbox-browser-entrypoint.sh

@@ -11,6 +11,7 @@ VNC_PORT="${OPENCLAW_BROWSER_VNC_PORT:-${CLAWDBOT_BROWSER_VNC_PORT:-5900}}"
 NOVNC_PORT="${OPENCLAW_BROWSER_NOVNC_PORT:-${CLAWDBOT_BROWSER_NOVNC_PORT:-6080}}"
 ENABLE_NOVNC="${OPENCLAW_BROWSER_ENABLE_NOVNC:-${CLAWDBOT_BROWSER_ENABLE_NOVNC:-1}}"
 HEADLESS="${OPENCLAW_BROWSER_HEADLESS:-${CLAWDBOT_BROWSER_HEADLESS:-0}}"
+ALLOW_NO_SANDBOX="${OPENCLAW_BROWSER_NO_SANDBOX:-${CLAWDBOT_BROWSER_NO_SANDBOX:-0}}"
 
 mkdir -p "${HOME}" "${HOME}/.chrome" "${XDG_CONFIG_HOME}" "${XDG_CACHE_HOME}"
 
@@ -43,9 +44,15 @@ CHROME_ARGS+=(
   "--disable-breakpad"
   "--disable-crash-reporter"
   "--metrics-recording-only"
-  "--no-sandbox"
 )
 
+if [[ "${ALLOW_NO_SANDBOX}" == "1" ]]; then
+  CHROME_ARGS+=(
+    "--no-sandbox"
+    "--disable-setuid-sandbox"
+  )
+fi
+
 chromium "${CHROME_ARGS[@]}" about:blank &
 
 for _ in $(seq 1 50); do