High severity · published Jun 23, 2026
CVE-2026-12958
Arbitrary file write in Language Servers for AWS
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
Missing symlink validation in Language Servers for AWS may allow an arbitrary file write outside of the workspace trust boundary. This may occur when a local user opens a workspace with a maliciously crafted symlink that resolves to a file path outside the workspace trust boundary.
To remediate this issue, users should upgrade to version 1.69.0 or higher.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LS
Language Servers for AWS · Amazon Web Services
before 1.69.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12958
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12958
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/2026-047-aws/
github.com
https://github.com/aws/language-servers/security/advisories/GHSA-6v3r-4p5c-mrp5
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