Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-55451— gettext-converter: Prototype pollution in js2i18next() via crafted translation keys

Quick assessment

Affected
locize gettext-converter
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

gettext-converter 提供了用于 JavaScript 的 gettext 资源转换工具。在 1.3.3 版本之前， 中的 函数使用 来分割嵌套的翻译键，其默认值为两个井号（#），并将每个片段直接用作动态对象键，且未过滤 、 或 。当应用程序转换不可信的 PO 或 i18next 翻译数据时，若其中包含 片段，该片段会被解析为 ，作为嵌套写入的目标，而 会将攻击者可控的翻译属性写入到整个进程范围的原型对象上。由此产生的原型污染可能导致服务拒绝（DoS），并可能引发依赖于具体应用的后续攻击。该问题已在

CVSS 8.3 · High EPSS 0.41% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
locize gettext-converter < 1.3.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-55451

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
gettext-converter: Prototype pollution in js2i18next() via crafted translation keys
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
locize gettext-converter < 1.3.3 -

II. Public POCs for CVE-2026-55451

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-55451

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-55451 (1)

Vendor Advisories for CVE-2026-55451 (1)

Proof of Concept for CVE-2026-55451 (1)

Vendor Pages for CVE-2026-55451 (1)

IV. Related Vulnerabilities

Same vendor: locize
Same weakness: CWE-1321

V. Comments for CVE-2026-55451

No comments yet

Leave a comment