NVD / CVE Program· CNA GitHub_M

CVE-2026-57112: PraisonAI ToolsMCPServer legacy SSE transport accepts attacker Host/Origin and exposes registered tools

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
Fixed version: praisonai (PyPI) 4.6.59; praisonaiagents (PyPI) 1.6.59.

Low priority for now. Upgrade to praisonai (PyPI) 4.6.59; praisonaiagents (PyPI) 1.6.59 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

PraisonAI is a multi-agent teams system. From praisonaiagents 0.6.0 until 1.6.59 and PraisonAI 3.10.0 until 4.6.59, ToolsMCPServer.run_sse() in src/praisonai-agents/praisonaiagents/mcp/mcp_server.py mounts SseServerTransport on the legacy /sse and /messages/ endpoints without default Host, Origin, or authentication enforcement. A malicious website can use DNS rebinding against a reachable local or internal SSE server, supply attacker-controlled Host and Origin headers, enumerate registered tools, and invoke them with the server user's privileges. The Streamable HTTP transport rejects the same hostile Origin, which isolates the flaw to the legacy SSE wrapper. An initial remediation was released in praisonaiagents 1.6.59 and PraisonAI 4.6.59.

HighCVSS 8.3 · v3.1—No exploit Fix available

Published: Sep 15, 2026
Updated: Sep 16, 2026
EPSS: 0.2% · 13th percentile
CWE: CWE-306

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 33 / 40 · 8.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 8.3; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

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—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

MervinPraison PraisonAI
- >= 3.10.0, < 4.6.59affected
MervinPraison praisonaiagents
- >= 0.6.0, < 1.6.59affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
PyPI	praisonai	from 3.10.0 · before 4.6.59	4.6.59
PyPI	praisonaiagents	from 0.6.0 · before 1.6.59	1.6.59

Same product

mervinpraison: all records

Other highest-scoring records for the same primary product.

CVE-2026-61447PraisonAI before 1.6.78 Remote Code Execution via CodeAgent
45Plan
CVE-2026-48168PraisonAI: GitHub Actions Claude workflow command injection via unquoted PR branch name
40Plan
CVE-2026-57116PraisonAI: AgentOS remains unauthenticated after GHSA-pm96 patched version and allows remote agent invocation
39Monitor

Published before and after this one in the same product

← EarlierCVE-2026-57132Sep 14, 2026 · PraisonAI: PRAISONAI_CALL_AUTH=disabled environment variable unconditionally disables authentication
32Monitor
← EarlierCVE-2026-57145Sep 14, 2026 · PraisonAI: Arbitrary File Read/Write via `multiedit` Tool Without Path Validation
36Monitor
Later →CVE-2026-57133Sep 15, 2026 · PraisonAI utility shell safe-command wrapper allowlist bypass via shell chaining
35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
PyPI:praisonai	4.6.59	Package registry (OSV)
PyPI:praisonaiagents	1.6.59	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

MervinPraison/PraisonAIcommit 2adfe7e

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-571390 days apartPraisonAI MCPServer exposes unauthenticated HTTP tools/call
39Monitor
CVE-2026-571251 days apartPraisonAI: Unauthenticated RCE via Jobs API + Approval Bypass
39Monitor
CVE-2026-571271 days apartpraisonai: recipe serve auth middleware silently disables itself when no secret is set
39Monitor
CVE-2026-5711827 days apartPraisonAI AgentTeam.launch exposes unauthenticated remote agent listing and invocation endpoints
39Monitor
CVE-2026-4739356 days apartPraisonAI `deploy --type api` emits a Flask server with authentication disabled by default
39Monitor
CVE-2026-571400 days apartPraisonAI AgentOS exposes unauthenticated agent listing and invocation
37Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-571360 days apartPraisonAI SandboxExecutor allowedCommands bypass via shell chaining
35Monitor
CVE-2026-571330 days apartPraisonAI utility shell safe-command wrapper allowlist bypass via shell chaining
35Monitor
CVE-2026-571261 days apartpraisonaiagents: SSRF guard validates literal IPs only and never resolves DNS
34Monitor
CVE-2026-568391 days apartPraisonAI Code agent tools fail open without a workspace boundary
29Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: Required
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1// Added for the support team
2app.post("/maintenance/reset", resetDevice);

Fixed

1if (config.maintenanceEnabled) {
2  app.post(
3    "/maintenance/reset",
4    requireSession, requireRole("admin"), resetDevice
5  );
6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

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References

github.com/MervinPraison/PraisonAI/commit/2adfe7e8323f6deec66925cf15a885b6238895e9

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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