CVE-2026-15033Public exploitNetwork attack vector

Command execution via unsanitized peer-dependency names

Published Jul 8, 2026 · Updated Jul 8, 2026

OS command injection in check-peer-dependencies 4.3.0 through 4.3.4 allows context-dependent attackers to execute commands via a crafted project. The solution and installation paths concatenate peer-dependency names from package.json into npm or yarn command strings that shelljs.exec passes to the operating-system shell without neutralizing metacharacters. Execution requires the tool to process an attacker-controlled project with --findSolutions or --install enabled, and injected commands run with the invoking user's privileges.

CVSS severity5.3
Medium
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in check-peer-dependencies 4.3.0 through 4.3.4 allows context-dependent attackers to execute commands via a crafted project. The solution and installation paths concatenate peer-dependency names from package.json into npm or yarn command strings that shelljs.exec passes to the operating-system shell without neutralizing metacharacters. Execution requires the tool to process an attacker-controlled project with --findSolutions or --install enabled, and injected commands run with the invoking user's privileges.

The record

CVE
CVE-2026-15033
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Chris Thielen
Product
check-peer-dependencies
Classifications
CWE-77, CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.3.0
  2. Affected versionversion=4.3.1
  3. Affected versionversion=4.3.2
  4. Affected versionversion=4.3.3
  5. Affected versionversion=4.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chris Thielen · check-peer-dependenciesversion=4.3.0; version=4.3.1; version=4.3.2; version=4.3.3; version=4.3.4

Published CVSS scores

5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
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

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Your stack

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