diff --git a/Backend/src/lib/Authentication.ts b/Backend/src/lib/Authentication.ts
index c533321..6e506ea 100644
--- a/Backend/src/lib/Authentication.ts
+++ b/Backend/src/lib/Authentication.ts
@@ -70,8 +70,11 @@ export function normalizeUsername(username: string): string {
}
/** Compute the cookie domain scope from the configured DOMAIN. */
-export function cookieDomain(domain: string): string {
- if (domain === "localhost") return "localhost";
+export function cookieDomain(domain: string): string | undefined {
+ // IP addresses cannot have a registrable parent domain. Treating the first
+ // octet as a subdomain would turn 100.74.255.106 into 74.255.106 and make
+ // browser sessions unusable on direct-IP test/self-hosted deployments.
+ if (domain === "localhost" || /^(?:\d{1,3}\.){3}\d{1,3}$/.test(domain)) return undefined;
if (domain.split(".").length > 2) {
// Subdomain deployment: scope to the registrable parent domain.
return domain.split(".").slice(1).join(".");
diff --git a/Backend/src/routes/api/auth.ts b/Backend/src/routes/api/auth.ts
index 5a552b2..dfa4904 100644
--- a/Backend/src/routes/api/auth.ts
+++ b/Backend/src/routes/api/auth.ts
@@ -16,10 +16,11 @@ import { createLogger } from "../../lib/logger";
const log = createLogger("auth");
function setSessionCookie(ctr: any, hash: string) {
+ const domain = cookieDomain(DOMAIN);
ctr.cookies.set(
SESSION_COOKIE,
new Cookie(hash, {
- domain: cookieDomain(DOMAIN),
+ ...(domain ? { domain } : {}),
httpOnly: true,
path: "/",
sameSite: "lax",
diff --git a/UI/src/components/AgentModals.tsx b/UI/src/components/AgentModals.tsx
index 8d65dbf..ad78967 100644
--- a/UI/src/components/AgentModals.tsx
+++ b/UI/src/components/AgentModals.tsx
@@ -210,12 +210,12 @@ curl -X POST ${origin}/v1/change-requests/{request_id}/consume -H "x-api-key: ${
)}
-
+
{tabs.map((t) => (