MCPJam inspector up to 1.4.2 HTTP missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.60

Summaryinfo

A vulnerability classified as critical has been found in MCPJam inspector up to 1.4.2. Affected by this issue is some unknown functionality of the component HTTP Handler. This manipulation causes missing authentication. This vulnerability appears as CVE-2026-23744. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in MCPJam inspector up to 1.4.2. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component HTTP Handler. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

MCPJam inspector is the local-first development platform for MCP servers. Versions 1.4.2 and earlier are vulnerable to remote code execution (RCE) vulnerability, which allows an attacker to send a crafted HTTP request that triggers the installation of an MCP server, leading to RCE. Since MCPJam inspector by default listens on 0.0.0.0 instead of 127.0.0.1, an attacker can trigger the RCE remotely via a simple HTTP request. Version 1.4.3 contains a patch.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-23744 since 01/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (52625). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/15/2026 CVE reserved
01/16/2026 +1 days Advisory disclosed
01/16/2026 +0 days VulDB entry created
07/16/2026 +181 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-232v-j27c-5pp6
Status: Confirmed

CVE: CVE-2026-23744 (🔒)
GCVE (CVE): GCVE-0-2026-23744
GCVE (VulDB): GCVE-100-341683
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/16/2026 23:28
Updated: 07/16/2026 09:32
Changes: 01/16/2026 23:28 (63), 01/17/2026 13:18 (1), 03/13/2026 16:33 (1), 07/16/2026 09:32 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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