CVE-2026-35460Public exploitNetwork attack vector

Phishing via unescaped email display name

Published Apr 7, 2026 · Updated Apr 7, 2026

HTML injection in Papra before 26.4.0 allows remote authenticated users to alter transactional email bodies through a crafted display name. The auth.emails.services.ts templates interpolate user.name directly into verification and password-reset HTML without escaping or sanitization. Registration with a crafted name and configured email delivery are required; resulting messages can replace legitimate links with phishing content from the deployment's trusted sender.

CVSS severity5.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in Papra before 26.4.0 allows remote authenticated users to alter transactional email bodies through a crafted display name. The auth.emails.services.ts templates interpolate user.name directly into verification and password-reset HTML without escaping or sanitization. Registration with a crafted name and configured email delivery are required; resulting messages can replace legitimate links with phishing content from the deployment's trusted sender.

The record

CVE
CVE-2026-35460
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Papra
Product
Papra
Classifications
CWE-80, CWE-79, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Papra · Papraversion=< 26.4.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.3GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1566.002Phishing: Spearphishing Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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