How severe is CVE-2026-49356?

CVE-2026-49356 has a CVSS 3.x base score of 3.2, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-49356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49356?

CVE-2026-49356 primarily affects Babel. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-49356?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-49356 have an EU (EUVD) identifier?

Yes. CVE-2026-49356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38302.

When was CVE-2026-49356 published?

CVE-2026-49356 was published on 2026-06-22 and last updated on 2026-06-26.

CVE-2026-49356

CVE-2026-49356 is a low-severity vulnerability in Babel with a CVSS 3.x base score of 3.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Low (CVSS 3.x base score 3.2)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38302
Weakness: CWE-22
Affected product: Babel
Published: 2026-06-22
Last modified: 2026-06-26

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.

Frequently asked questions

What is CVE-2026-49356?: 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.
How severe is CVE-2026-49356?: CVE-2026-49356 has a CVSS 3.x base score of 3.2, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-49356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49356?: CVE-2026-49356 primarily affects Babel. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-49356?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-49356 have an EU (EUVD) identifier?: Yes. CVE-2026-49356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38302.
When was CVE-2026-49356 published?: CVE-2026-49356 was published on 2026-06-22 and last updated on 2026-06-26.

References

https://github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8

Affected products (29)

cpe:2.3:a:babel:babel:*:*:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha0:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha10:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha11:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha12:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha13:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha14:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha15:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha16:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha17:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha5:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha6:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha7:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha8:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:alpha9:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:beta0:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:rc4:*:*:*:*:*:*
cpe:2.3:a:babel:babel:8.0.0:rc5:*:*:*:*:*:*

More vulnerabilities in Babel

CVE-2026-44728 — High (CVSS 8.2): Babel is a compiler for writing next generation JavaScript. From 7.12.0 to before 7.29.4 and 8.0.0-alpha.13, using…

All CVEs affecting Babel →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →