CVE-2026-18953
Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server
MEDIUM 6.3EPSS 0.2%
Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter. To remediate this issue, users should upgrade to version 0.1.5 or later.
- Affected
- AWS · aws-transform-mcp-server
- CVSS v4.0 CNA
- 6.3 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - CVSS v3.1 CNA
- 8.6 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - EPSS
- 0.18% chance of exploitation in the next 30 days, 7th percentile
- Published
- 2026-08-05
- Updated
- 2026-08-06
Proof-of-concept exploits (1)
- ronamosa/CVE-2026-189530★ · 2026-08-08
Security advisories
- https://aws.amazon.com/security/security-bulletins/2026-075-aws
- awslabs/mcp/security/advisories/GHSA-66mr-jr63-2jgw
- https://pypi.org/project/awslabs.aws-transform-mcp-server/0.1.5