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Fencer Vulns
high 8.2

CVE-2026-44728 json

Improper Control of Generation of Code when compiling specifically crafted malicious code with @babel/plugin-transform-modules-systemjs

published 2026-05-08 6 mo ago modified 2026-09-10 1 mo ago also GHSA-fv7c-fp4j-7gwp , EUVD-2026-31946

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

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 Babel to compile code that was specifically crafted by an attacker can cause Babel to generate output code that executes arbitrary code. This vulnerability is fixed in 7.29.4 and 8.0.0-alpha.13.

Patch / fix

  • npm @babel/plugin-transform-modules-systemjs 7.29.4, 8.0.0-alpha.13
  • babel babel 7.29.4
  • node-babel7 Debian 14 8.0.4+ds1+~cs177.303.116-2

debian advisories DEBIAN-CVE-2026-44728

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm @babel/plugin-transform-modules-systemjs
>=7.12.0, <7.29.4
>=8.0.0-alpha.0, <8.0.0-alpha.13
7.29.4
8.0.0-alpha.13

Affected products

  • babel babel
  • @babel plugin-transform-modules-systemjs

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code
  • CWE-843 Access of Resource Using Incompatible Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.