CVE-2026-55537— PraisonAI: Webhook SSRF via DNS fail-open in `JobSubmitRequest.validate_webhook_url()` — bypass of CVE-2026-40114
Quick assessment
Affected
MervinPraison PraisonAI
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
PraisonAI 是一个多智能体团队系统。在 praisonai 4.6.58 版本之前， 方法在解析 引发 异常时，由于使用了 （即静默忽略该异常），仍会接受此 URL。随后， 会执行一次新的 DNS 查找，这使得攻击者可以通过篡改 DNS 记录，将请求重定向到内部服务。该问题已在版本 4.6.58 中得到修复。
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I. Basic Information for CVE-2026-55537
Vulnerability Information
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Vulnerability Title
PraisonAI: Webhook SSRF via DNS fail-open in `JobSubmitRequest.validate_webhook_url()` — bypass of CVE-2026-40114
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, JobSubmitRequest.validate_webhook_url() accepts webhook_url when resolution raises socket.gaierror because the exception path uses except socket.gaierror: pass. JobExecutor._send_webhook() later performs a fresh lookup, allowing DNS changes to direct the request to an internal service. This issue is fixed in version 4.6.58.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| MervinPraison | PraisonAI | < 4.6.58 | - |
|
II. Public POCs for CVE-2026-55537
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
Qwen3.6-35B-A3B
· 9899 chars
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Trigger conditions & impact
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III. Intelligence Information for CVE-2026-55537
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Patches & Fixes for CVE-2026-55537 (2)
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🔗 Release PraisonAI v4.6.58 · MervinPraison/PraisonAI · GitHub x_refsource_MISC
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Same Patch Batch · MervinPraison · 2026-08-25 · 17 CVEs total
| CVE-2026-55536 | 9.1 CRITICAL | Browser Server WebSocket origin validation bypass via unanchored regex (patch bypass of CV |
| CVE-2026-55541 | 8.8 HIGH | PraisonAI: `--api-key` flag on `praisonai serve` is not properly enforced |
| CVE-2026-55534 | 8.6 HIGH | PraisonAI serve agents --api-key is ignored, allowing unauthenticated remote agent executi |
| CVE-2026-55539 | 8.6 HIGH | PraisonAI: [Auth Bypass] PraisonAI async Jobs API (`/api/v1/runs`) has no authentication — |
| CVE-2026-55526 | 8.5 HIGH | PraisonAI: SSRF protection bypass in `spider_tools._host_is_blocked()` via DNS-resolved ho |
| CVE-2026-55528 | 8.2 HIGH | praisonaiagents: AgentServer declares auth_token but never enforces it on any route (CWE-8 |
| CVE-2026-55533 | 8.2 HIGH | PraisonAI: Authentication fail-open in Recipe server allows unauthenticated access when AP |
| CVE-2026-55532 | 7.6 HIGH | PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cros |
| CVE-2026-55525 | 7.5 HIGH | PraisonAI: SSRF via redirect-following in praisonaiagents web_crawl |
| CVE-2026-55538 | 7.3 HIGH | PraisonAI: [Auth Bypass] `praisonai serve agents --api-key` is silently ignored — agent-in |
| CVE-2026-55527 | 7.1 HIGH | PraisonAI: Arbitrary file write via unsanitized `user_id` in `FileMemory.__init__()` — pat |
| CVE-2026-55540 | 7.1 HIGH | PraisonAI: [Path Traversal] agent tools escape the configured workspace via symlinks |
| CVE-2026-55529 | 6.9 MEDIUM | PraisonAI: Origin validation bypass in MCP HTTP Stream transport allows browser-mediated u |
| CVE-2026-55535 | 6.8 MEDIUM | PraisonAI: Server-Side Request Forgery via DNS rebinding bypass in webhook_url validation |
| CVE-2026-55531 | 6.5 MEDIUM | PraisonAI: Unauthenticated unbounded session accumulation in the PraisonAI MCP HTTP server |
| CVE-2026-55530 | 6.1 MEDIUM | PraisonAI: ast_grep_rewrite rewrites arbitrary files without the @require_approval gate en |
IV. Related Vulnerabilities
Same product: PraisonAI
-
CVE-2026-55536
Browser Server WebSocket origin validation bypass via unanch -
CVE-2026-55532
PraisonAI: Origin-validation bypass (startswith prefix match -
CVE-2026-55533
PraisonAI: Authentication fail-open in Recipe server allows -
CVE-2026-55539
PraisonAI: [Auth Bypass] PraisonAI async Jobs API (`/api/v1/ -
CVE-2026-55527
PraisonAI: Arbitrary file write via unsanitized `user_id` in
Same vendor: MervinPraison
-
CVE-2026-55536
Browser Server WebSocket origin validation bypass via unanch -
CVE-2026-55532
PraisonAI: Origin-validation bypass (startswith prefix match -
CVE-2026-55533
PraisonAI: Authentication fail-open in Recipe server allows -
CVE-2026-55539
PraisonAI: [Auth Bypass] PraisonAI async Jobs API (`/api/v1/ -
CVE-2026-55527
PraisonAI: Arbitrary file write via unsanitized `user_id` in
Same weakness: CWE-367
-
CVE-2026-55535
PraisonAI: Server-Side Request Forgery via DNS rebinding byp -
CVE-2026-56708
Grav API Plugin before 1.0.16 SSRF via DNS Rebinding -
CVE-2026-9728
TOCTOU race in mbox_send syscall verifier allows userspace t -
CVE-2026-49114
ONNX symlink-following and path-traversal arbitrary file wri -
CVE-2026-16935
Vulnerabilities in IBM AIX and PowerVM VIOS
V. Comments for CVE-2026-55537
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