CVE-2026-48051Public exploitNetwork attack vector

Authenticated SSRF via unchecked webhook redirects

Published Jul 27, 2026 · Updated Jul 27, 2026

SSRF in Papra before 26.5.0 allows remote authenticated users to send blind HTTP requests to internal addresses through webhooks. The webhook client validates only the registered URL, then ofetch.raw follows unchecked 3xx Location targets beyond the IP blocklist. Any organization member can trigger requests and infer open services from success or failure, but response bodies are not exposed by the API.

CVSS severity3.5
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Papra before 26.5.0 allows remote authenticated users to send blind HTTP requests to internal addresses through webhooks. The webhook client validates only the registered URL, then ofetch.raw follows unchecked 3xx Location targets beyond the IP blocklist. Any organization member can trigger requests and infer open services from success or failure, but response bodies are not exposed by the API.

The record

CVE
CVE-2026-48051
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Papra
Product
Papra
Classifications
CWE-918
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 26.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Papra · Papraversion=< 26.5.0

Published CVSS scores

3.5GitHubCVSS:3.1/AV:N/AC:H/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.

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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-918Server-Side Request Forgery (SSRF)

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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