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Frappe EUVDEUVD-2026-98162

| CVE-2026-109599 MEDIUM
Missing Authorization (CWE-862)
2026-10-12 VulnCheck GHSA-8wcf-q578-5h65
5.3
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with low-privilege account
  2. Exploit
    Identify endpoints missing authorization checks
  3. Execution
    Send crafted record-modification request
  4. Impact
    Tamper with records beyond assigned role

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires a valid authenticated session on the target Frappe/ERPNext instance (PR:L); the attacker must hold at least a low-privilege role and then reach the specific endpoints that omit role-based authorization enforcement. The concrete prerequisite is possession of any legitimate user account, after which crafted API requests to those endpoints allow modifying records outside the account's permitted scope. Limiting factors: no anonymous/unauthenticated path (an account is mandatory), no user interaction needed, and impact is confined to record modification (integrity) - there is no confidentiality disclosure or availability impact, and the flaw is fixed in 15.113.3 and 16.25.0.

Impact

This is a medium-severity broken-access-control flaw (CWE-862), and the signals are internally consistent rather than conflicting. The vendor-supplied CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N) scores 5.3 and describes a network-reachable, low-complexity attack that requires an authenticated low-privilege account (PR:L), with impact limited to integrity (VI:L) - no confidentiality or availability loss. This aligns cleanly with the description: authenticated users abusing endpoints that skip authorization checks to modify records beyond their role. No EPSS score, KEV listing, or public POC was provided, so this is not a confirmed-exploitation priority; it is a real but bounded privilege-escalation/data-tampering issue. The main thing keeping real-world risk moderate is the authentication requirement - an attacker needs a valid account on the target instance, so the threat is primarily insider or post-compromise lateral abuse rather than mass unauthenticated exploitation. EPSS/KEV/POC data is absent (not necessarily low - simply not supplied), so widespread opportunistic exploitation can be neither confirmed nor ruled out from the input.

Exploit ScenarioDerived

A low-privilege authenticated user of a Frappe/ERPNext instance (e.g. a limited-role employee) crafts direct API requests to endpoints that fail to enforce role-based authorization, modifying records they should not be able to edit. No public exploit code was identified, and no user interaction or elevated privileges beyond a standard account are required, but a valid login is a prerequisite.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 12, 2026

Missing authorization checks in Frappe versions before 15.113.3 and 16.x before 16.25.0 allow authenticated users with low-privilege roles to modify records beyond their assigned permissions via crafted API requests to certain endpoints. Exploitation requires a valid authenticated session (PR:L) and impacts only integrity, with no confidentiality or availability impact. No public exploit has been identified at time of analysis, and the flaw is fixed in versions 15.113.3 and 16.25.0.

RemediationAI

Apply the vendor-released patches by upgrading to Frappe 15.113.3 (for 15.x) or 16.25.0 (for 16.x). These versions fix the missing authorization checks. If an immediate upgrade is not possible, review the vendor advisory to identify the specific vulnerable endpoints and consider temporarily restricting access to them via a reverse proxy or API gateway, though this may disrupt legitimate functionality; alternatively, audit and minimize the roles assigned to authenticated users to reduce the attack surface. Monitor application logs for unexpected record modifications from low-privilege accounts. Refer to the GitHub advisory (https://github.com/frappe/frappe/security/advisories/GHSA-22v9-hw3x-x59w) for any additional mitigations or endpoint details.

Affected VersionsENISA

frappe 16.0.0-beta.1 <16.25.0
frappe 0 <15.113.3

Affected Packages

euvd frappe fix: 15.113.3, 16.25.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Frappe is a full-stack web application framework that provides role-based access control through DocType permissions and API endpoints. CVE-2026-109599 is a CWE-862 Missing Authorization flaw where specific endpoints fail to enforce these role-based checks, enabling an authenticated user with any low-privilege role to bypass intended authorization and modify records outside their permitted scope. The affected component is identified by CPE cpe:2.3:a:frappe:frappe:*:*:*:*:*:*:*:* (all versions prior to the fixed releases). The independent assessment confirms a CVSS 3.1 vector of AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, indicating network-exploitable, low-complexity attacks requiring low privileges and no user interaction, with limited integrity impact. The provided CVSS 4.0 vector aligns with this assessment (PR:L, VI:L). Root cause is missing authorization enforcement on certain API endpoints, a common issue in frameworks where developers may forget to apply permission checks.

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Severity by source

Vendor (VulnCheck) PRIMARY 5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
vuln.today AI 4.3 MEDIUM

Network-reachable endpoints (AV:N), no special conditions (AC:L), but a valid authenticated account is required (PR:L); impact limited to unauthorized record modification, so I:L and C/A:N.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
Patch available
Oct 13, 2026 - 02:16 EUVD

DescriptionCVE.org

Frappe before 15.113.3 and 16.x before 16.25.0 contains a missing authorization vulnerability in which certain endpoints fail to enforce proper authorization checks. Authenticated users can send requests to these endpoints to modify records beyond what their assigned role permits.

Threat Intelligence Overview

EPSS Score
0.2%
Top 92% exploitable
Prevalence
Medium
open-source framework behind ERPNext, moderate SMB/ERP deployment footprint
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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