CVE-2026-35461Public exploitNetwork attack vector

Authenticated SSRF via unfiltered webhook requests

Published Apr 7, 2026 · Updated Apr 7, 2026

SSRF in the Papra webhook system before 26.4.0 allows remote authenticated users to make server-side requests to arbitrary URLs. The webhook route checks only URL syntax, and webhookHttpClient passes the supplied URL directly to ofetch.raw without resolving or filtering private addresses. Any authenticated user can trigger POSTs on document events to scan internal services or reach cloud metadata endpoints; returned payloads are stored but not exposed through the UI or API.

CVSS severity5.0
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in the Papra webhook system before 26.4.0 allows remote authenticated users to make server-side requests to arbitrary URLs. The webhook route checks only URL syntax, and webhookHttpClient passes the supplied URL directly to ofetch.raw without resolving or filtering private addresses. Any authenticated user can trigger POSTs on document events to scan internal services or reach cloud metadata endpoints; returned payloads are stored but not exposed through the UI or API.

The record

CVE
CVE-2026-35461
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Papra
Product
Papra
Classifications
CWE-918, CAPEC-664, T1046, T1552.005
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

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1046Network Service Discovery
T1552.005Unsecured Credentials Cloud Instance Metadata API

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo