GHSA-4x5r-pxfx-6jf8Published

Babel: Arbitrary File Read via sourceMappingURL Comment in @babel/core

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cve-program · CVE-2026-49356

Published

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.

Source published: 22 Jun 2026 16:07:01 UTC
Source modified: 22 Jun 2026 17:23:03 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 3.2 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

euvd · EUVD-2026-38302

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jun 22, 2026, 4:07:01 PM

dateUpdated: Jun 22, 2026, 5:23:03 PM

4 related source bulletins · separate from aliases

openSUSE-SU-2026:21448-1: Security update for agama-web-ui

CVE-2025-7783 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13311 · CVE-2026-13676 · CVE-2026-27601 · CVE-2026-40181 · CVE-2026-49356 · CVE-2026-53550 · CVE-2026-53632 · CVE-2026-54466 · CVE-2026-54490 · CVE-2026-55602

openSUSE-SU-2026:12070-1: velociraptor-0.76.7.0.git145.b60ef1146-1.1 on GA media

CVE-2025-0914 · CVE-2026-12143 · CVE-2026-14257 · CVE-2026-17535 · CVE-2026-18348 · CVE-2026-18636 · CVE-2026-18638 · CVE-2026-18639 · CVE-2026-18860 · CVE-2026-27601 · CVE-2026-29074 · CVE-2026-41650 · CVE-2026-45623 · CVE-2026-49356 · CVE-2026-5329 · CVE-2026-53550 · CVE-2026-55602 · CVE-2026-56852 · CVE-2026-59869 · CVE-2026-6290 · CVE-2026-64951 · CVE-2026-64952 · CVE-2026-64954 · CVE-2026-65903 · CVE-2026-65912 · CVE-2026-65913 · CVE-2026-65914 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-6863 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-6948 · CVE-2026-73086 · CVE-2026-73646 · CVE-2026-73650 · CVE-2026-7572 · CVE-2026-7573 · CVE-2026-84369 · CVE-2026-84370

openSUSE-SU-2026:11680-1: agama-web-ui-24+0.a836cced5-52.1 on GA media

CVE-2025-7783 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-33245 · CVE-2026-49356 · CVE-2026-53550 · CVE-2026-53632 · CVE-2026-54466 · CVE-2026-55602 · CVE-2026-67313 · CVE-2026-67315 · CVE-2026-67317 · CVE-2026-67319 · CVE-2026-67321 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73650

msrc_CVE-2026-49356: Babel: Arbitrary File Read via sourceMappingURL Comment in @babel/core

CVE-2026-49356

Source published: Jun 22, 2026, 4:07:01 PM (timezone not stated)
Source modified: Jun 22, 2026, 5:23:03 PM (timezone not stated)
Saved here: 13 Nov 2026 14:00:43 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 3.1 · 3.2 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

nvd · CVE-2026-49356

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-22 · CWE-200

Original publisher date fields

published: 2026-06-22T18:16:41.107

lastModified: 2026-06-26T20:04:23.897

29 source CPE criteria · context only

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:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 22 Jun 2026 18:16:41 UTC
Source modified: 26 Jun 2026 20:04:23 UTC
Saved here: 25 Oct 2026 12:17:32 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 3.2 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS 3.1 · [email protected] · Primary · 3.6 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

osv · GHSA-4x5r-pxfx-6jf8

Published

## Impact Using `@babel/core` to compile maliciously crafted code can allow ab attacker to read any source map from the system that is running Babel, if these conditions are _all_ true: - the attacker controls the input source code - the attacker can read the output source code - the attacker knows the path of the source map file that they want to read **Users that only compile trusted code are not impacted.** ## Patches The vulnerability has been fixed in `@babel/[email protected]` and `@babel/[email protected]`. ## Workarounds Callers can mitigate the issue without upgrading by setting [`inputSourceMap: false`](https://babeljs.io/docs/options#inputsourcemap) in their Babel options. Callers can also manually extract the `#sourceMappingURL` comment from the input source code, validate whether the source map that it links to is allowed to be read, and if it is pass an object to `inputSourceMap` (passing `false` when it's not). ## Credits Thanks Teodor-Cristian Radoi for reporting the vulnerability.

Source published: 15 Jun 2026 17:14:14 UTC
Source modified: 10 Sep 2026 03:50:48 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Publisher rating · LOW