CVE-2026-18953: 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

highCVSS 8.6CVE-2026-18953

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.6
Published: 2026-08-05
Last updated: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-18953

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-189530.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-18953	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-18953 - Improper limitation of a pathname in AWS Transform MCP Serveraws

Recent advisories for Improper limitation of

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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unknownCVE-2026-18953 - Improper limitation of a pathname in AWS Transform MCP Serveraws · 2026-08-05
highCVE-2026-47613: NVIDIA Dynamo for Linux contains a vulnerability where an attacker may cause improper limitati…nvd · 2026-08-04
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mediumCVE-2026-14194: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability i…nvd · 2026-08-04