CVE-2026-49356: Babel is a compiler for writing next generation JavaScript

Q: How do I fix CVE-2026-49356?

babel: upgrade to 7.29.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-49356 being exploited?

CVE-2026-49356 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-49356 affect?

CVE-2026-49356 affects babel. Severity is low (CVSS 3.2). 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 at

Q: How urgent is CVE-2026-49356?

Priority 12/100. No elevated risk signals yet.

Routine

LOW 3.2UPGRADE

CVE-2026-49356 is a low-severity flaw (CVSS 3.2) affecting babel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.2 (Low)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-22, CWE-200
Published	2026-06-22
Last modified	2026-06-26

Publisher (CNA): GitHub, Inc. · Vendor: babel

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-22 18:16 UTCPublished CVE record published
2026-06-26 20:04 UTCUpdated Record last modified

babel babel UPGRADE

Affected: < 7.29.6 · 8.0.0 alpha0 · 8.0.0 alpha1 · 8.0.0 alpha10 · 8.0.0 alpha11 · 8.0.0 alpha12 · 8.0.0 alpha13 · 8.0.0 alpha14

Fixed in: 7.29.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy babel || rpm -q babel || babel --version

2. UPGRADE to 7.29.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade babel

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade babel

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-49356?

babel: upgrade to 7.29.6. Exact commands for each OS are on this page.

Is CVE-2026-49356 being exploited?

CVE-2026-49356 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-49356 affect?

CVE-2026-49356 affects babel. Severity is low (CVSS 3.2). 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 at

How urgent is CVE-2026-49356?

Priority 12/100. No elevated risk signals yet.

References

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