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CVE-2026-77508— Weblate: Unverified REST API email changes

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 的本地化（翻译管理）工具。在 2026.8 版本之前，经过身份验证的用户可以通过向 发送 PUT 或 PATCH 请求来修改账户的主要邮箱地址，且系统未对新邮箱地址进行验证（例如未发送确认邮件），从而允许该邮箱地址后来接收团队邀请时，无需访问原收件人邮箱即可接受邀请。该问题已在 2026.8 版本中修复。

CVSS 3.5 · Low

Possible ATT&CK Techniques 1 AI

T1158
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I. Basic Information for CVE-2026-77508

Vulnerability Information
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Vulnerability Title
Weblate: Unverified REST API email changes
Source: CVE Program / CVE List V5
Vulnerability Description
Weblate is a web based localization tool. Prior to 2026.8, an authenticated user can change the account's primary email through PUT or PATCH requests to /api/users/{username}/ without verifying the new address, allowing a later team invitation for that address to be accepted without access to the intended recipient's mailbox. This issue is fixed in version 2026.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用假设不可变数据进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WeblateOrg weblate < 2026.8 -

II. Public POCs for CVE-2026-77508

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III. Intelligence Information for CVE-2026-77508

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Patches & Fixes for CVE-2026-77508 (1)

Vendor Advisories for CVE-2026-77508 (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-2026-62326 6.5 MEDIUM Weblate Has Uncontrolled Resource Consumption via
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-2026-77573 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-302

V. Comments for CVE-2026-77508

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