Read the docs
TI-2026-27590 Aliases CVE-2026-35460

Papra has an HTML Injection in Transactional Emails via Unescaped User Display Name

Priority MEDIUM 58CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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: [email protected]), this enables convincing phishing attacks that appear to originate from official Papra notifications. This vulnerability is fixed in 26.4.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed papra (papra-hq): 26.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
papra-hqpaprabefore 26.4.026.4.0Patch availableCNA
  • papra Vendorpapra-hq Affected before 26.4.0 Fixed in 26.4.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:papra:papra:*:*:*:*:*:*:*:*before 26.4.0Vulnerablepapra-hq
  • cpe:2.3:a:papra:papra:*:*:*:*:*:*:*:* Versions before 26.4.0 Vulnerable ·papra-hq

Remediation

  • Fix · CNA papra (papra-hq) Fixed in 26.4.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35460

References

Exploit 1

  • TI-2026-27591 Papra has a Blind Server-Side Request Forgery (SSRF) via Webhook URL CVSS 3.1MEDIUM 5.0
  • TI-2026-27592 Papra Does Not Reject Expired API Keys CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences