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CVE-2026-35460— Papra has an HTML Injection in Transactional Emails via Unescaped User Display Name

Quick assessment

Affected
papra-hq papra
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.

Papra是Papra开源的一个文档管理与归档平台。 Papra 26.4.0之前版本存在安全漏洞，该漏洞源于事务性电子邮件模板将user.name直接插入HTML而未进行转义或清理，可能导致注册时显示名包含HTML标签的攻击者将这些标签注入验证和密码重置电子邮件正文，从而发起看似来自官方Papra通知的钓鱼攻击。

CVSS 4.3 · Medium EPSS 0.23% · P13
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I. Basic Information for CVE-2026-35460

Vulnerability Information
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Vulnerability Title
Papra has an HTML Injection in Transactional Emails via Unescaped User Display Name
Source: CVE Program / CVE List V5
Vulnerability Description
Papra is a minimalistic document management and archiving platform. Prior to 26.4.0, transactional email templates in Papra interpolate user.name directly into HTML without escaping or sanitization. An attacker who registers with a display name containing HTML tags will have those tags injected into the verification and password reset email bodies. Since emails are sent from the legitimate domain (e.g: auth@mail.papra.app), this enables convincing phishing attacks that appear to originate from official Papra notifications. This vulnerability is fixed in 26.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Papra 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Papra是Papra开源的一个文档管理与归档平台。 Papra 26.4.0之前版本存在安全漏洞，该漏洞源于事务性电子邮件模板将user.name直接插入HTML而未进行转义或清理，可能导致注册时显示名包含HTML标签的攻击者将这些标签注入验证和密码重置电子邮件正文，从而发起看似来自官方Papra通知的钓鱼攻击。
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
papra-hq papra < 26.4.0 -

II. Public POCs for CVE-2026-35460

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III. Intelligence Information for CVE-2026-35460

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Vendor Advisories for CVE-2026-35460 (1)

Same Patch Batch · papra-hq · 2026-04-07 · 3 CVEs total

CVE-2026-35461 5.0 MEDIUM Papra has a Blind Server-Side Request Forgery (SSRF) via Webhook URL
CVE-2026-35462 4.3 MEDIUM Papra Does Not Reject Expired API Keys

IV. Related Vulnerabilities

Same product: papra
Same vendor: papra-hq
Same weakness: CWE-80

V. Comments for CVE-2026-35460

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