CVE-2026-55451

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Source
https://cve.org/CVERecord?id=CVE-2026-55451
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55451.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55451
Aliases
Published
2026-09-14T16:49:36Z
Modified
2026-09-16T03:46:58Z
Severity
  • 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
gettext-converter: Prototype pollution in js2i18next() via crafted translation keys
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55451.json"
}
References

Affected packages

Git / github.com/locize/gettext-converter

Affected ranges

Type
GIT
Repo
https://github.com/locize/gettext-converter
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
df90c3b93e51faef68891d97b626544f619c5b31
Fixed
4b02e8c5c2a873b638a4d90bd8459213ba323724
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.3.3"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.3.0
v1.3.1
v1.3.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55451.json"