CVE-2026-12958

HIGH

7.8

CVSS v3

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.

CWE-61

How to fix

Remediation Available

@aws/lsp-codewhisperernpm

Fixed in:0.0.117GHSA-6v3r-4p5c-mrp5

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.19%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-61 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-28189	Critical	10.0	7.2%	-	-
CVE-2024-28185	Critical	10.0	7.1%	-	-
CVE-2019-11249	Medium	6.5	3.7%	-	Fix
CVE-2019-11246	Medium	6.5	3.6%	-	Fix
CVE-2019-16775	High	7.7	3.3%	-	Fix
CVE-2019-11251	Medium	4.8	2.6%	-	Fix

Common questions

How do I fix CVE-2026-12958?

Upgrade @aws/lsp-codewhisperer to 0.0.117 or later.

Is CVE-2026-12958 being actively exploited?

Not that we know of. CVE-2026-12958 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.19% is the estimated probability that it will be exploited in the next 30 days. That is higher than 8% of all scored CVEs.

How severe is CVE-2026-12958?

CVE-2026-12958 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-12958 affect?

Published advisories record a fix for @aws/lsp-codewhisperer (npm). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-23.