CVE-2026-39351Network attack vector

Unauthorized document disclosure via unchecked link expansion

Published Apr 7, 2026 · Updated Apr 7, 2026

Missing authorization in Frappe Framework before 15.104.0 and from 16.0.0-beta.1 before 16.14.0 allows remote attackers to read linked documents. The v1 REST API's expand_links path calls frappe.get_doc without check_permission, and BaseDocument.json serializes the full linked record without field filtering. Exploitation requires access to a readable document whose Link or Dynamic Link field references a restricted document, exposing that linked record's data.

CVSS severity9.1
Critical
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Frappe Framework before 15.104.0 and from 16.0.0-beta.1 before 16.14.0 allows remote attackers to read linked documents. The v1 REST API's expand_links path calls frappe.get_doc without check_permission, and BaseDocument.json serializes the full linked record without field filtering. Exploitation requires access to a readable document whose Link or Dynamic Link field references a restricted document, exposing that linked record's data.

The record

CVE
CVE-2026-39351
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Frappe Technologies Pvt. Ltd.
Product
Frappe Framework
Classifications
CWE-862, T1213
Attack vector
network
Privileges
unauthenticated

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

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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=< 15.104.0
  2. Affected versionversion=>= 16.0.0-beta.1, < 16.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Frappe Technologies Pvt. Ltd. · Frappe Frameworkversion=< 15.104.0; version=>= 16.0.0-beta.1, < 16.14.0

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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