CVE-2026-55451High· 8.3▾ MidnightPoC availablegettext-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 sign…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 45.7 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 8.3
medium → high
Exploit / PoC code exists
0.4%
0.4% → 0.6%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
gettext-converter < 1.3.3Patched in:
gettext-converter 1.3.3Source: https://github.com/advisories/GHSA-f4jp-rw7w-ccwg
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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