CVE Catalog

CVE-2026-55451

HighCVSS 8.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.57%

45th percentile - higher than 45% of all known CVEs

Summary

gettext-converter before version 1.3.3 in js2i18next() uses dynamic object keys without rejecting __proto__, constructor, or prototype. Converting untrusted translation data can lead to prototype pollution affecting the entire process.

Risk Assessment

Prototype pollution can cause denial of service and may enable application-dependent follow-on attacks, such as object manipulation.

Recommendation

Upgrade gettext-converter to version 1.3.3 or later and validate translation data before conversion.

Related vulnerabilities

Original NVD description (English source)

gettext-converter provides gettext resource conversion utilities for JavaScript. Prior to 1.3.3, js2i18next() in lib/js2i18next.js splits nested translation keys using options.keyseparator, whose default value consists of two number signs, and uses each segment as a dynamic object key without rejecting __proto__, constructor, or prototype. When an application converts untrusted PO or i18next translation data, a __proto__ segment resolves Object.prototype as the nested write target and Object.assign writes attacker-controlled translated properties onto the process-wide prototype. The resulting prototype pollution can cause denial of service and may enable application-dependent follow-on attacks. This issue is fixed in version 1.3.3.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS