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CVE Vulnerability Details :
CVE-2026-12957
PUBLISHED
More InfoOfficial Page
Assigner-AMZN
Assigner Org ID-ff89ba41-3aa1-4d27-914a-91399e9639e5
View Known Exploited Vulnerability (KEV) details
Published At-23 Jun, 2026 | 16:02
Updated At-23 Jun, 2026 | 17:50
Rejected At-
▼CVE Numbering Authority (CNA)
Arbitrary Code Execution in Language Servers for AWS

Improper trust boundary enforcement in Language Servers for AWS before version 1.65.0 on all supported platforms may allow a for arbitrary code execution. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed. This issue requires the user to trust the workspace when prompted. To remediate this issue, users should upgrade to Language Servers for AWS version 1.65.0 or higher.

Affected Products
Vendor
Amazon Web Services
Product
Language Servers for AWS
Default Status
unaffected
Versions
Affected
  • From 0 before 1.65.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-732CWE-732: Incorrect Permission Assignment for Critical Resource
Type: CWE
CWE ID: CWE-732
Description: CWE-732: Incorrect Permission Assignment for Critical Resource
Metrics
VersionBase scoreBase severityVector
4.08.5HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Version: 4.0
Base score: 8.5
Base severity: HIGH
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-549CAPEC-549 Local Execution of Code
CAPEC ID: CAPEC-549
Description: CAPEC-549 Local Execution of Code
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://aws.amazon.com/security/security-bulletins/2026-047-aws/
vendor-advisory
https://github.com/aws/language-servers/security/advisories/GHSA-xhcr-j4j9-3gh7
third-party-advisory
Hyperlink: https://aws.amazon.com/security/security-bulletins/2026-047-aws/
Resource:
vendor-advisory
Hyperlink: https://github.com/aws/language-servers/security/advisories/GHSA-xhcr-j4j9-3gh7
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found