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TI-2026-58772 Aliases CVE-2026-85660GHSA-wfpw-4v5h-6h32

cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution

Priority HIGH 75CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

cli-mcp-server 0.2.5 contains a command allowlist bypass vulnerability in the _validate_command_with_operators function when ALLOW_SHELL_OPERATORS is enabled. Attackers can use shell command substitution syntax like $(...) or backticks to execute non-allowlisted commands that bypass the ALLOWED_COMMANDS validation check.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00622 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MladenSUcli-mcp-serverup to 0.2.5—No fix listedCNA
  • cli-mcp-server VendorMladenSU Affected up to 0.2.5 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-85660
  2. 2026-10-03 Alias added: GHSA-wfpw-4v5h-6h32
  3. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences