fix(opencode): validate upgrade requests

opencode-agent · Aug 12, 2026 · Aug 12, 2026 · 251ce4a2ab7338f2f50cb5f8f02934c83082b3cc
commit 251ce4a2ab7338f2f50cb5f8f02934c83082b3cc
diff --git a/packages/opencode/src/server/routes/instance/httpapi/groups/global.ts b/packages/opencode/src/server/routes/instance/httpapi/groups/global.ts
@@ -5,7 +5,8 @@ import { InstanceDisposed } from "@/server/event"
 import "@opencode-ai/core/account"
 import "@/server/event"
 import { Schema } from "effect"
-import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, HttpApiSchema, OpenApi } from "effect/unstable/httpapi"
+import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+import semver from "semver"
 import { described } from "./metadata"
 
 const GlobalHealth = Schema.Struct({
@@ -48,7 +49,9 @@ const GlobalEventSchema = Schema.Struct({
 }).annotate({ identifier: "GlobalEvent" })
 
 export const GlobalUpgradeInput = Schema.Struct({
-  target: Schema.optional(Schema.String),
+  target: Schema.optional(
+    Schema.String.check(Schema.makeFilter((value) => semver.valid(value) !== null || "Expected a semantic version")),
+  ),
 })
 
 const GlobalUpgradeResult = Schema.Union([
@@ -121,7 +124,7 @@ export const GlobalApi = HttpApi.make("global").add(
         }),
       ),
       HttpApiEndpoint.post("upgrade", GlobalPaths.upgrade, {
-        payload: [HttpApiSchema.NoContent, GlobalUpgradeInput],
+        payload: GlobalUpgradeInput,
         success: described(GlobalUpgradeResult, "Upgrade result"),
         error: HttpApiError.BadRequest,
       }).annotateMerge(

diff --git a/packages/opencode/src/server/routes/instance/httpapi/handlers/global.ts b/packages/opencode/src/server/routes/instance/httpapi/handlers/global.ts
@@ -129,6 +129,10 @@ export const globalHandlers = HttpApiBuilder.group(RootHttpApi, "global", (handl
     const upgradeRaw = Effect.fn("GlobalHttpApi.upgradeRaw")(function* (ctx: {
       request: HttpServerRequest.HttpServerRequest
     }) {
+      const contentType = ctx.request.headers["content-type"]?.split(";", 1)[0].trim().toLowerCase()
+      if (contentType !== "application/json") {
+        return HttpServerResponse.jsonUnsafe({ success: false, error: "Expected application/json" }, { status: 415 })
+      }
       const body = yield* Effect.orDie(ctx.request.text)
       const json = parseBody(body)
       if (json === undefined) {

diff --git a/packages/opencode/test/server/httpapi-global.test.ts b/packages/opencode/test/server/httpapi-global.test.ts
@@ -43,9 +43,12 @@ const apiLayer = HttpRouter.serve(
 const it = testEffect(apiLayer)
 
 describe("global HttpApi", () => {
-  it.live("upgrades to latest when the request body is omitted", () =>
+  it.live("upgrades to latest with an empty JSON payload", () =>
     Effect.gen(function* () {
-      const response = yield* HttpClient.post(GlobalPaths.upgrade)
+      const response = yield* HttpClientRequest.post(GlobalPaths.upgrade).pipe(
+        HttpClientRequest.bodyJson({}),
+        Effect.flatMap(HttpClient.execute),
+      )
 
       expect(response.status).toBe(200)
       expect(yield* response.json).toEqual({ success: true, version: "9.9.9" })
@@ -63,4 +66,40 @@ describe("global HttpApi", () => {
       expect(yield* response.json).toEqual({ success: false, error: "Invalid request body" })
     }),
   )
+
+  it.live("rejects non-JSON upgrade payloads", () =>
+    Effect.gen(function* () {
+      const response = yield* HttpClientRequest.post(GlobalPaths.upgrade).pipe(
+        HttpClientRequest.setBody(HttpBody.text('{"target":"1.2.3"}', "text/plain")),
+        HttpClient.execute,
+      )
+
+      expect(response.status).toBe(415)
+      expect(yield* response.json).toEqual({ success: false, error: "Expected application/json" })
+    }),
+  )
+
+  it.live("rejects non-semver upgrade targets", () =>
+    Effect.gen(function* () {
+      const response = yield* HttpClientRequest.post(GlobalPaths.upgrade).pipe(
+        HttpClientRequest.bodyJson({ target: "latest" }),
+        Effect.flatMap(HttpClient.execute),
+      )
+
+      expect(response.status).toBe(400)
+      expect(yield* response.json).toEqual({ success: false, error: "Invalid request body" })
+    }),
+  )
+
+  it.live("accepts semantic version upgrade targets", () =>
+    Effect.gen(function* () {
+      const response = yield* HttpClientRequest.post(GlobalPaths.upgrade).pipe(
+        HttpClientRequest.bodyJson({ target: "1.2.3-beta.1" }),
+        Effect.flatMap(HttpClient.execute),
+      )
+
+      expect(response.status).toBe(200)
+      expect(yield* response.json).toEqual({ success: true, version: "1.2.3-beta.1" })
+    }),
+  )
 })