Is this vulnerability remotely exploitable?

It can be exploited remotely in a supply-chain sense: an attacker only needs to publish or control a malicious Python package that is later processed by pyp2spec and built by a packager or automated pipeline.

What level of access does an attacker need?

The attacker must be able to influence the package metadata consumed by pyp2spec—typically by maintaining or compromising a package that will be converted into an RPM spec and built with rpmbuild.

What is the safest general fix pattern?

The safest pattern is to ensure all untrusted metadata is sanitized and escaped before being embedded in spec files, eliminating or neutralizing RPM macro syntax so that descriptive fields cannot be interpreted as commands during the build.

Severity:

HIGH RISK

(7.8)

Unvalidated Input and Macro Injection (CWE-20, CWE-94) in pyp2spec RPM Spec Generation

CVE-2026-42301

Published:

May 8, 2026

Status:

Received

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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CWE-94

HIGH RISK

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PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

CWE-94

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Code Injection via Unvalidated Input

CWE:

CWE-20;CWE-94

Impact:

Arbitrary Code Execution on Build Infrastructure

Severity:

HIGH RISK

(7.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Code Injection via Unvalidated Input

CWE:

CWE-20;CWE-94

Impact:

Arbitrary Code Execution on Build Infrastructure

Severity:

HIGH RISK

(7.8)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Unvalidated Input and Macro Injection (CWE-20, CWE-94) in pyp2spec RPM Spec Generation

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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