Vulnerability in Babel
CVE-2025-27789
Babel is a compiler for writing next generation JavaScript. When using versions of Babel prior to 7.26.10 and 8.0.0-alpha.17 to compile regular expression named capturing groups, Babel will generate a polyfill for the `.replace` method tha…
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.005 (37.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Babel — versions < 7.26.10, >= 8.0.0-alpha.0, < 8.0.0-alpha.17
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-27789?
- CVE-2025-27789 is a medium-severity vulnerability in Babel, classified under Inefficient Regular Expression Complexity. CVSS score: 6.2/10. Published 2025-03-11.
- How severe is CVE-2025-27789?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2025-27789 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.