Authentication Bypass in praisonai (CVE-2026-61435)
Summary
Authentication bypass in praisonai (CVE-2026-61435). Data can be tampered with by attackers. Exploitable via POST /api/v1/agents/{agent_id}/invoke. Mitigation: upgrade to 4.6.78 or later.
Original description
The description as published by the source.
Call API localhost-only authentication bypass via spoofed Host header
Summary
PraisonAI's patched PRAISONAI_CALL_AUTH=disabled safeguard for the n8n/call agent invocation API can be bypassed with a spoofed Host: 127.0.0.1 header, allowing an unauthenticated network caller to list and invoke registered agents when the service is reachable and the opt-out is enabled.
Technical Details
The affected code is src/praisonai/praisonai/api/agent_invoke.py. verify_token() is used as a FastAPI dependency for the /api/v1/agents routes, including POST /api/v1/agents/{agent_id}/invoke. Current code no longer unconditionally skips authentication when PRAISONAI_CALL_AUTH=disabled; it tries to allow that opt-out only for localhost binding:
_LOCALHOST_HOSTS = frozenset({'127.0.0.1', 'localhost', '::1'})
def _bind_host_from_request(request: Request) -> str:
host = getattr(getattr(request, 'url', None), 'hostname', None)
return host or os.getenv('PRAISONAI_CALL_BIND_HOST', '127.0.0.1')
async def verify_token(request: Request, authorization: Optional[str] = Header(None)) -> None:
if _call_auth_disabled():
bind_host = _bind_host_from_request(request)
if bind_host not in _LOCALHOST_HOSTS:
raise HTTPException(
status_code=503,
detail="PRAISONAI_CALL_AUTH=disabled is only permitted for localhost binding",
)
return
The violated invariant is that "localhost binding" mu…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-61435 has been found in praisonai.
Attackers can target a specific entry point like POST /api/v1/agents/{agent_id}/invoke over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 8.2/10.
What to do: upgrade praisonai to 4.6.78 or later.
If unsure, ask your IT team or search "praisonai CVE-2026-61435" on the vendor's site.
CVE-2026-61435 (praisonai) — CWE-287 / CVSS v3 8.2
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: POST /api/v1/agents/{agent_id}/invoke / Host header / request.url.hostname / praisonai.api.agent_invoke
Patched: 4.6.78 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Authentication bypass (CWE-287) exists in praisonai. Attackers reach the vulnerable code path via POST /api/v1/agents/{agent_id}/invoke without authentication.
Check the vendor advisory for the affected versions of praisonai. Attack surface: POST /api/v1/agents/{agent_id}/invoke / Host header / request.url.hostname / praisonai.api.agent_invoke.
Severity: High (CVSS 8.2/10). Data can be tampered with by attackers.
Update to 4.6.78.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/v1/agents/{agent_id}/invoke requests with malformed payloads or SQL meta-characters. Run grep -r 'praisonai' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'praisonai' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
praisonaiを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/v1/agents/{agent_id}/invoke' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/agents/{agent_id}/invokeへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade praisonai to 4.6.78ステージング環境で 4.6.78 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against POST /api/v1/agents/{agent_id}/invoke on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- package pypi.org
- web github.com
- web github.com
- web github.com
- web vulncheck.com
- web github.com