Security readout for executives and security teams
Plain-English summary
CVE-2026-0757 is a high-severity flaw in MCP Manager for Claude Desktop. If a user visits a malicious page or opens a malicious file, an attacker may escape the intended sandbox and run code as the current user process. This creates meaningful risk to confidentiality, integrity, and availability on affected desktops.
Executive priority
Treat this as a near-term desktop application risk where MCP Manager is deployed. Prioritize inventory and vendor update tracking. Business urgency is higher for teams using Claude Desktop with external or untrusted MCP content, because user interaction can trigger code execution outside the intended sandbox.
Technical view
The issue is CWE-78 command injection in processing MCP config objects. A user-supplied string is not properly validated before being used in a system call. ZDI reports this can allow sandbox escape and arbitrary code execution in the current process at medium integrity. The listed affected version is commit 1140651e836cabe746f444bdc449cdd2429c4bca.
Likely exposure
Exposure is limited to environments using MCP Manager for Claude Desktop, especially the listed affected commit. Successful exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. The source bundle does not identify broader affected versions or platforms.
Exploitation context
The CVSS vector indicates network attack path, low complexity, no privileges required, and required user interaction. The CVE is not listed as KEV in the provided data, and the sources do not state active exploitation. Avoid assuming exploitation in the wild without additional evidence.
Researcher notes
The public details identify the vulnerability class and impact but not a patch, exploit proof, or complete version range. Analysis should focus on MCP config object handling and system-call boundaries, without assuming unlisted affected releases. Validate exposure against the specific commit and any future vendor statements.
Mitigation direction
- Check MCP Manager and vendor guidance for a fixed release or recommended workaround.
- Update affected installations when an official fixed version is available.
- Limit opening untrusted MCP-related files, pages, or configuration content.
- Remove or disable MCP Manager where it is not business-essential.
- Prioritize endpoint monitoring for suspicious child processes from Claude Desktop or MCP Manager.
Validation and detection
- Inventory systems running MCP Manager for Claude Desktop.
- Check whether installed builds match commit 1140651e836cabe746f444bdc449cdd2429c4bca.
- Confirm whether users can import or open untrusted MCP config content.
- Review endpoint telemetry for unusual process execution tied to MCP Manager.
- Track the CVE and ZDI advisory for updated affected-version or fix details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-0757 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ZDI-26-023CVE reference · x_research-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.