CVE-2026-15895Public exploit

Command execution via unsanitized npm package specifier

Published Jul 15, 2026 · Updated Jul 15, 2026

OS command injection in AWS jsii-diff before 1.131.0 allows context-dependent attackers to execute commands via npm package specifiers. The npm: loader embeds the package-specifier portion in a shell command without neutralizing metacharacters, so a semicolon starts an additional command. Control of a jsii-diff command-line argument and active execution by another user or process are required, and injected commands inherit the tool's permissions.

CVSS severity8.4
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in AWS jsii-diff before 1.131.0 allows context-dependent attackers to execute commands via npm package specifiers. The npm: loader embeds the package-specifier portion in a shell command without neutralizing metacharacters, so a semicolon starts an additional command. Control of a jsii-diff command-line argument and active execution by another user or process are required, and injected commands inherit the tool's permissions.

The record

CVE
CVE-2026-15895
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Amazon Web Services
Product
jsii
Classifications
CWE-78, T1059
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.131.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Amazon Web Services · jsiiversion=0 <1.131.0

Published CVSS scores

8.4Amazon Web ServicesCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo