CVSS 3.1
3.6 lowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:NCVE-2026-49356
Low (3.6) in babel babel. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in @babel/core 7.29.6, 8.0.0-rc.6.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- babel:babel
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4x5r-pxfx-6jf8 | npm | @babel/core | >=8.0.0-alpha.0 <8.0.0-rc.6 | 8.0.0-rc.6 |
| GHSA-4x5r-pxfx-6jf8 | npm | @babel/core | <7.29.6 | 7.29.6 |