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CVE-2026-33220— Weblate: JavaScript localization CDN add-on allows arbitrary local file read outside the repository

Quick assessment

Affected
WeblateOrg weblate
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.

Weblate是Weblate开源的一个 Copyleft 的基于 web 的自由软件持续本地化系统。 Weblate 5.17之前版本存在安全漏洞，该漏洞源于翻译记忆API暴露了未预期的端点，且未执行适当的访问控制。

CVSS 6.8 · Medium EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-33220

Vulnerability Information
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Vulnerability Title
Weblate: JavaScript localization CDN add-on allows arbitrary local file read outside the repository
Source: CVE Program / CVE List V5
Vulnerability Description
Weblate is a web based localization tool. In versions prior to 5.17, the translation memory API exposed unintended endpoints, which in turn didn't perform proper access control. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can disable this feature as the CDN add-on is not enabled by default.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Weblate 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Weblate是Weblate开源的一个 Copyleft 的基于 web 的自由软件持续本地化系统。 Weblate 5.17之前版本存在安全漏洞，该漏洞源于翻译记忆API暴露了未预期的端点，且未执行适当的访问控制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WeblateOrg weblate < 5.17 -

II. Public POCs for CVE-2026-33220

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III. Intelligence Information for CVE-2026-33220

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Same Patch Batch · WeblateOrg · 2026-04-15 · 10 CVEs total

CVE-2026-34393 8.8 HIGH Weblate: Privilege escalation in the user API endpoint
CVE-2026-33435 8.1 HIGH Weblate: Remote code execution during backup restoration
CVE-2026-34242 7.7 HIGH Weblate: Arbitrary File Read via Symlink
CVE-2026-40256 5.0 MEDIUM Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Co
CVE-2026-34244 5.0 MEDIUM Weblate: SSRF via Project-Level Machinery Configuration
CVE-2026-33440 5.0 MEDIUM Weblate: Authenticated SSRF via redirect bypass of ALLOWED_ASSET_DOMAINS in screenshot URL
CVE-2026-33214 4.3 MEDIUM Weblate has improper access control for the translation memory API
CVE-2026-39845 4.1 MEDIUM Weblate: SSRF via the webhook add-on using unprotected fetch_url()
CVE-2026-33212 3.1 LOW Weblate: Improper access control for pending tasks in API

IV. Related Vulnerabilities

Same product: weblate
Same vendor: WeblateOrg
Same weakness: CWE-22

V. Comments for CVE-2026-33220

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