Low severity3.2GHSA Advisory· Published Jun 22, 2026· Updated Jun 26, 2026
CVE-2026-49356
CVE-2026-49356
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@babel/corenpm | >= 8.0.0-alpha.0, < 8.0.0-rc.6 | 8.0.0-rc.6 |
@babel/corenpm | < 7.29.6 | 7.29.6 |
Affected products
82<= 7.29.0+ 29 more
- (no CPE)range: <= 7.29.0
- cpe:2.3:a:babel:babel:*:*:*:*:*:*:*:*range: <7.29.6
- cpe:2.3:a:babel:babel:8.0.0:alpha0:*:*:*:*:*:*
- 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:alpha1:*:*:*:*:*:*
- 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:*:*:*:*:*:*
- osv-coords52 versionspkg:apk/chainguard/airflow-3pkg:apk/chainguard/argo-workflows-ui-3.6pkg:apk/chainguard/authentik-2026.2pkg:apk/chainguard/authentik-2026.5pkg:apk/chainguard/authentik-fips-2026.2pkg:apk/chainguard/authentik-fips-2026.5pkg:apk/chainguard/katib-earlystoppingpkg:apk/chainguard/katib-suggestion-hyperbandpkg:apk/chainguard/katib-suggestion-hyperoptpkg:apk/chainguard/katib-suggestion-nas-dartspkg:apk/chainguard/katib-suggestion-nas-enaspkg:apk/chainguard/katib-suggestion-optuna-enaspkg:apk/chainguard/katib-suggestion-pbt-enaspkg:apk/chainguard/katib-suggestion-skopt-enaspkg:apk/chainguard/katib-tfevent-metricscollectorpkg:apk/chainguard/langfuse-2-workerpkg:apk/chainguard/langfuse-3-workerpkg:apk/chainguard/langfuse-fips-2-workerpkg:apk/chainguard/langfuse-fips-3-workerpkg:apk/chainguard/py3-babelpkg:apk/chainguard/py3.10-babelpkg:apk/chainguard/py3.10-captumpkg:apk/chainguard/py3.11-babelpkg:apk/chainguard/py3.11-captumpkg:apk/chainguard/py3.12-babelpkg:apk/chainguard/py3.12-captumpkg:apk/chainguard/py3.13-babelpkg:apk/chainguard/py3.13-captumpkg:apk/chainguard/ts-patchpkg:apk/chainguard/vitess-24pkg:apk/chainguard/wazuh-dashboard-dashboards-reportingpkg:apk/chainguard/wazuh-dashboard-dashboards-reporting-fipspkg:apk/wolfi/airflow-3pkg:apk/wolfi/katib-earlystoppingpkg:apk/wolfi/katib-suggestion-hyperbandpkg:apk/wolfi/katib-suggestion-hyperoptpkg:apk/wolfi/katib-suggestion-nas-dartspkg:apk/wolfi/katib-suggestion-nas-enaspkg:apk/wolfi/katib-suggestion-optuna-enaspkg:apk/wolfi/katib-suggestion-pbt-enaspkg:apk/wolfi/katib-suggestion-skopt-enaspkg:apk/wolfi/katib-tfevent-metricscollectorpkg:apk/wolfi/langfuse-3-workerpkg:apk/wolfi/py3-babelpkg:apk/wolfi/py3.10-babelpkg:apk/wolfi/py3.11-babelpkg:apk/wolfi/py3.12-babelpkg:apk/wolfi/py3.13-babelpkg:apk/wolfi/ts-patchpkg:apk/wolfi/vitess-24pkg:rpm/opensuse/agama-web-ui&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/agama-web-ui&distro=openSUSE%20Tumbleweed
< 3.2.2-r8+ 51 more
- (no CPE)range: < 3.2.2-r8
- (no CPE)range: < 3.6.19-r7
- (no CPE)range: < 2026.2.6-r11
- (no CPE)range: < 2026.5.4-r1
- (no CPE)range: < 2026.2.6-r12
- (no CPE)range: < 2026.5.4-r1
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 2.95.12-r31
- (no CPE)range: < 3.191.0-r0
- (no CPE)range: < 2.95.12-r34
- (no CPE)range: < 3.192.0-r0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0.9.0-r1
- (no CPE)range: < 0
- (no CPE)range: < 0.9.0-r1
- (no CPE)range: < 0
- (no CPE)range: < 0.9.0-r1
- (no CPE)range: < 0
- (no CPE)range: < 0.9.0-r1
- (no CPE)range: < 4.0.1-r43
- (no CPE)range: < 24.0.2-r2
- (no CPE)range: < 4.14.7-r10
- (no CPE)range: < 4.14.7-r12
- (no CPE)range: < 3.2.2-r8
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 0.19.0-r31
- (no CPE)range: < 3.191.0-r0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 4.0.1-r43
- (no CPE)range: < 24.0.2-r2
- (no CPE)range: < 17+673.b97ba64d6-160000.12.1
- (no CPE)range: < 24+0.a836cced5-52.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-4x5r-pxfx-6jf8ghsaADVISORY
- github.com/babel/babel/security/advisories/GHSA-4x5r-pxfx-6jf8nvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-49356ghsaADVISORY
- babeljs.io/docs/optionsghsaWEB
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