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CVE-2026-62326— Weblate Has Uncontrolled Resource Consumption via

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 是一个基于 Web 的持续本地化平台，用于管理软件翻译。在 2026.7 版本之前的版本中，具有内置“编辑源”角色的用户可以存储一个恶意的正则表达式于源字符串的标志（flags）中，该正则表达式在执行时没有任何超时限制，从而允许攻击者通过停滞请求来造成服务拒绝（Denial of Service）。通过 质量检查和正则表达式占位符提供的正则表达式，虽然在验证期间会被编译，但随后会在 和 中针对翻译内容运行，且没有时间限制，因此像 这样的灾难性回溯模式可能会无限期地消耗 CPU。由于当源单元的标志发生

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-62326

Vulnerability Information
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Vulnerability Title
Weblate Has Uncontrolled Resource Consumption via
Source: CVE Program / CVE List V5
Vulnerability Description
Weblate is a web-based continuous localization platform used to manage software translations. In versions prior to 2026.7, a user with the built-in "Edit source" role can store a malicious regular expression in a source string's flags that is executed without any timeout, allowing them to stall requests and deny service. Regular expressions supplied through the regex: quality check and regex placeholders are compiled during validation but later run against translation content in RegexCheck and PlaceholderCheck with no time limit, so a catastrophic-backtracking pattern like ^(a|aa)+$ can consume CPU indefinitely. Because Weblate re-runs these checks for every linked target unit in the same request when a source unit's flags change, a single edit can trigger sustained CPU-bound denial of service. This issue is fixed in version 2026.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WeblateOrg weblate < 2026.7 -

II. Public POCs for CVE-2026-62326

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III. Intelligence Information for CVE-2026-62326

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Patches & Fixes for CVE-2026-62326 (1)

Vendor Advisories for CVE-2026-62326 (1)

Same Patch Batch · WeblateOrg · 2026-08-26 · 9 CVEs total

CVE-2026-55228 8.1 HIGH Weblate:: WebIDOR in GroupViewSet allows authenticated project manager to gain unauthorize
CVE-2026-61792 7.7 HIGH Weblate path traversal allows a project administrator to read arbitrary files via App stor
CVE-2026-77507 5.3 MEDIUM Weblate: Object-scoped RSS feeds disclose private change history to unauthorized users
CVE-2026-61790 4.4 MEDIUM Weblate: Team-enforced 2FA is bypassed for global permissions
CVE-2026-62249 4.3 MEDIUM Weblate: Restricted-component change history leaked to non-member project users through th
CVE-2026-55227 4.3 MEDIUM Observable object existence disclosure in private Weblate projects via globally scoped obj
CVE-2026-77508 3.5 LOW Weblate: Unverified REST API email changes
CVE-2026-77573 3.5 LOW Weblate: DNS rebinding in VCS operations allows server-side request forgery

IV. Related Vulnerabilities

Same product: weblate
Same vendor: WeblateOrg
Same weakness: CWE-400

V. Comments for CVE-2026-62326

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