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CVE-2026-49356

3.2 · LOW

Babel is a compiler for writing next generation JavaScript.

Published Jun 22, 2026CWE-22EPSS 0.15%

Overview

CVE-2026-49356 is a low-severity vulnerability. It was published on June 22, 2026 and has a CVSS 3.1 base score of 3.2 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.2, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Babel is a compiler for writing next generation JavaScript. Prior to 8.0.0-rc.6 and 7.29.6, @babel/core affected by an arbitrary file read via a sourceMappingURL comment. Using @babel/core to compile maliciously crafted code can allow an attacker to read any source map from the system that is running Babel, if the attacker controls the input source code, can read the output source code, and knows the path of the source map file that they want to read. This vulnerability is fixed in 8.0.0-rc.6 and 7.29.6.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-49356?

CVE-2026-49356 is a low-severity vulnerability. It was published on June 22, 2026 and has a CVSS 3.1 base score of 3.2 (LOW).

How severe is CVE-2026-49356?

This vulnerability has a CVSS 3.1 base score of 3.2, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-49356?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-49356?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-49356 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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