How severe is CVE-2026-18953?

CVE-2026-18953 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-18953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-18953?

CVE-2026-18953 affects Amazon Aws Transform Mcp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-18953?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-18953 published?

CVE-2026-18953 was published on 2026-08-05 and last updated on 2026-08-10.

CVE-2026-18953

CVE-2026-18953 is a high-severity vulnerability in Amazon Aws Transform Mcp Server with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v4: 6.3
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Amazon Aws Transform Mcp Server
Published: 2026-08-05
Last modified: 2026-08-10

Description

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-18953?: CVE-2026-18953 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-18953 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-18953?: CVE-2026-18953 affects Amazon Aws Transform Mcp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-18953?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-18953 published?: CVE-2026-18953 was published on 2026-08-05 and last updated on 2026-08-10.

References

Affected products (1)

cpe:2.3:a:amazon:aws_transform_mcp_server:*:*:*:*:*:python:*:*

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