Bug 2533213 (CVE-2026-55451)

Summary: CVE-2026-55451 gettext-converter: gettext-converter: Denial of Service via Prototype Pollution
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, sghai, sidsharm, suppawar, vlaad
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in gettext-converter. This vulnerability, known as prototype pollution, occurs in the `js2i18next()` function when processing untrusted translation data. An attacker can craft malicious translation keys containing `__proto__` to modify the global `Object.prototype`. This can lead to a denial of service (DoS) and potentially enable further application-specific attacks.
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Description OSIDB Bzimport 2026-09-14 17:20:07 UTC 
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.