NVD

CVE-2026-49356 Detail

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 3.6 LOW

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Nist CVSS score does not match with CNA score

CNA: GitHub, Inc.

Base Score: 3.2 LOW

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8	GitHub, Inc.	Mitigation Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	GitHub, Inc.
CWE-200	Exposure of Sensitive Information to an Unauthorized Actor	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Initial Analysis by NIST 6/26/2026 4:04:23 PM

Action

Type

Old Value

New Value

Added

CVSS V3.1

AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Added

CPE Configuration

OR
          *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: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:*:*:*:*:*:*:*:* versions up to (excluding) 7.29.6
          *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: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:*:*:*:*:*:*

Added

Reference Type

GitHub, Inc.: https://github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8 Types: Mitigation, Vendor Advisory

New CVE Received from GitHub, Inc. 6/22/2026 2:16:41 PM

Action	Type	New Value
Added	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.
Added	CVSS V3.1	AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Added	CWE	CWE-22
Added	CWE	CWE-200
Added	Reference	https://github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8
Added	Affected	[{"vendor":"babel","product":"babel","versions":[{"version":">= 8.0.0-alpha.0, < 8.0.0-rc.5","status":"affected"},{"version":"< 7.29.6","status":"affected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-49356
NVD Published Date:
06/22/2026
NVD Last Modified:
06/26/2026
Source:
GitHub, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2026-49356 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

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Change History

Initial Analysis by NIST 6/26/2026 4:04:23 PM

CVE Modified by CISA-ADP 6/22/2026 3:17:03 PM

New CVE Received from GitHub, Inc. 6/22/2026 2:16:41 PM

Quick Info