CVE-2025-12758 Affecting verdaccio package, versions <6.2.5-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-VERDACCIO-14186952
- published5 Dec 2025
- disclosed27 Nov 2025
Introduced: 27 Nov 2025
CVE-2025-12758 (opens in a new tab)How to fix?
Upgrade Minimos:latest verdaccio to version 6.2.5-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream verdaccio package and not the verdaccio package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.
References
- https://www.cve.org/CVERecord?id=CVE-2025-12758
- https://github.com/advisories/GHSA-vghf-hv5q-vc2g
- https://osv.dev/vulnerability/MINI-jv5q-pv59-w2fc
- https://osv.dev/vulnerability/CVE-2025-12758
- https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
- https://github.com/validatorjs/validator.js/pull/2616
- http://seclists.org/fulldisclosure/2026/Jan/27
- https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476