CVE-2026-94496

Executive Summary

CVE-2026-94496 is a missing authorization (CWE-862) vulnerability in jshERP through version 3.6, in which role management endpoints fail to validate caller permissions. Any authenticated user — regardless of privilege level — can invoke the /role/update and /role/delete endpoints to modify any role's data scope (including escalating visibility to "all data") or delete arbitrary roles. Successful exploitation yields horizontal and vertical privilege escalation within the tenant, exposing all business records and enabling destructive role manipulation, with a CVSS 3.1 base score of 8.3 (High).

Technical Analysis

The vulnerability resides in the authorization model of jshERP's role management feature. Per the NVD description, the application "fails to validate caller permissions in role management endpoints." This is a textbook broken access control condition classified as CWE-862 (Missing Authorization): the affected endpoints are reachable and routable, but the server does not verify that the requesting principal holds the administrative privilege required to perform role administration.

Two endpoints are explicitly named in the advisory:

• /role/update — permits modification of an existing role's definition, including its data scope (the boundary determining which business records the role can view). By changing data scope to "all data," an attacker widens visibility beyond their legitimate tenant/role segment.
• /role/delete — permits deletion of roles, enabling destructive impact and potentially removal of restrictive roles that constrain access.

The core defect is the absence of a server-side permission check — not a cryptographic flaw, injection, or memory-safety issue. Because the check is missing rather than bypassable, no malformed payload, encoding trick, or special header is required; the endpoints respond to ordinary authenticated requests. The CVSS vector AV:N/AC:L/PR:L/UI:N confirms the attack is network-reachable, low-complexity, requires only low privileges (any authenticated account), and needs no user interaction. Note that the scope is S:U (Unchanged) and confidentiality/integrity impacts are C:H/I:H, while availability is A:L, reflecting that the primary harm is unauthorized data exposure and unauthorized modification rather than service outage.

The authorization is presumably implemented at the presentation or controller layer while the role-management service layer assumes the caller has already been vetted, or the endpoints omit the interceptor/filter that guards other administrative routes. The specific classes, methods, and filter chains are not disclosed in the available data, so no code-level identifiers can be asserted beyond the two documented endpoint paths. Insufficient technical detail is available regarding the exact authentication/authorization framework used.

Exploitation Scenarios

No public proof-of-concept is available for CVE-2026-94496; the following chain is inferred from the vulnerability class (missing authorization on named endpoints) and the NVD description. It uses only the endpoint paths documented in the advisory.

1. Reconnaissance / target identification. The attacker identifies an internet- or intranet-exposed jshERP instance (through 3.6). Because the flaw requires authentication, the attacker first obtains any valid low-privilege account — a self-registered account, a guest/limited operator credential, a compromised or shared account, or credentials from a prior breach. No administrative role is needed.

2. Triggering the flaw class. With a valid low-privilege session, the attacker sends an authenticated request directly to the role management endpoints. The server does not validate that the caller possesses role-administration permission, so the request is processed as though issued by an administrator. The vulnerability is triggered simply by reaching /role/update or /role/delete with a legitimate session — no privilege token, special parameter, or malformed input is required.

3. Payload / execution (vulnerability-class level). Against /role/update, the attacker submits a role modification that sets the target role's data scope to "all data." This widens the data boundary of the role the attacker controls (or a role they can leverage), granting visibility into records across the entire tenant rather than a restricted subset. Against /role/delete, the attacker submits a deletion request for a target role — for example, removing restrictive roles to weaken access controls or to disrupt operations affecting other users. The exact request body/parameter schema is not disclosed in the available data and is therefore not specified here.

4. Post-exploitation impact. After expanding data scope, the attacker reads business records that should be hidden from them — customer, order, financial, or inventory data belonging to the tenant — achieving C:H confidentiality impact. Role deletion and unauthorized role modification yield I:H integrity impact and can degrade availability (A:L) for affected users. If a role can be reconfigured to a broader privilege set, this constitutes vertical escalation; even absent that, it is horizontal escalation across the tenant's data. The attacker can also delete roles to cover tracks or to induce denial-of-service conditions for legitimate administrators.

Impact Assessment

The impact is severe for any organization running an unpatched jshERP instance that exposes the application to untrusted authenticated users. Because only a low-privilege account is required (PR:L) and no user interaction is needed (UI:N), the effective barrier to exploitation is the ability to authenticate at all. The confidentiality impact is High (C:H): an attacker can change a role's data scope to "all data" and thereby access all business records in the tenant, directly violating data segregation expectations. Integrity is High (I:H): roles — the very objects that govern authorization — can be modified or deleted, corrupting the access-control model and any audit trail that depends on role definitions. Availability is Low (A:L), consistent with role deletion disrupting access for some users without taking the whole system down.

Blast radius: All tenants that share an affected deployment's role-management plane are conceptually at risk, though the advisory frames impact at the tenant level ("all business records in the tenant"). The affected system class is self-hosted or cloud-hosted jshERP deployments through 3.6. Business consequences include unauthorized disclosure of financial, customer, and inventory data; regulatory exposure (e.g., GDPR/CCPA-style data-protection duties) from cross-boundary record access; and erosion of trust in the platform's access-control guarantees. Because the flaw corrupts authorization state, remediation requires not only patching but also auditing role definitions and data-scope settings for unauthorized changes.

Detection Guidance

Sigma Rule

title: jshERP Role Management Authorization Abuse (CVE-2026-94496)
id: 9f1c2b7a-4d3e-4a91-9c55-7b2e0a6f1d44
status: experimental
description: Detects authenticated requests to jshERP role management endpoints /role/update and /role/delete, which lack permission validation and can be abused for privilege escalation.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-94496
author: valtersit.com
date: 2026-01-01
logsource:
  category: webserver
detection:
  selection_path:
    cs-uri-stem|contains:
      - '/role/update'
      - '/role/delete'
  selection_method:
    cs-method:
      - 'POST'
      - 'PUT'
      - 'DELETE'
  condition: selection_path and selection_method
fields:
  - c-ip
  - cs-username
  - cs-uri-stem
  - cs-method
falsepositives:
  - Legitimate administrative role management from authorized console users
level: high
tags:
  - attack.privilege_escalation
  - attack.t1068
  - cve.2026.94496

YARA Rule

rule CVE_2026_94496_jshERP_role_endpoints
{
    meta:
        description = "Detects jshERP role management endpoint references in logs or traffic captures for CVE-2026-94496"
        author = "valtersit.com"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-94496"
        date = "2026-01-01"
        severity = "high"

    strings:
        $ep1 = "/role/update" ascii wide nocase
        $ep2 = "/role/delete" ascii wide nocase
        $app = "jshERP" ascii wide nocase

    condition:
        (any of ($ep*)) and $app
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-94496 jshERP Role Management Unauthorized Access Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/role/update"; nocase; http.uri; content:"/role/delete"; nocase; classtype:attempted-admin; reference:cve,2026-94496; reference:url,nvd.nist.gov/vuln/detail/CVE-2026-94496; sid:202694496; rev:1;)

Elastic Detection

sequence by user.name with maxspan=5m
  [ network where http.request.method in ("POST","PUT","DELETE") and
      http.request.uri : ("/role/update*", "/role/delete*") ]

Splunk SPL Query

index=web OR index=proxy
| eval uri=coalesce(uri, url, cs_uri_stem)
| eval method=coalesce(http_method, cs_method)
| where (like(uri, "%/role/update%") OR like(uri, "%/role/delete%"))
        AND (method="POST" OR method="PUT" OR method="DELETE")
| stats count values(uri) as endpoints values(method) as methods by src_ip, user
| where count > 0
| sort - count

Wazuh OSSEC Rule

<group name="web,jshERP,">
  <rule id="100496" level="12">
    <if_sid>31100</if_sid>
    <url>/role/update|/role/delete</url>
    <description>CVE-2026-94496: Unauthorized jshERP role management endpoint access (possible privilege escalation).</description>
    <mitre>
      <id>T1068</id>
    </mitre>
    <group>access_control,cve_2026_94496,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source). No vendor fix, affected-version list, or OSV package entry is available. The following is advisory and should be validated against any future vendor release.

1. Immediate mitigations

   • Enforce authorization at the edge: place /role/update and /role/delete behind a reverse proxy, WAF, or API gateway that permits access only from trusted administrative sources (IP allowlists, VPN, or administrative network segments).
   • Restrict the role-management routes to a dedicated administrative role and add a compensating server-side permission check at the application layer until the vendor fixes the code.
   • Reduce the authenticated-user attack surface: disable self-registration and review all low-privilege/guest accounts; enforce least privilege so fewer principals can reach the endpoints.
   • Enable and centralize web access logs for the two endpoints and monitor for unexpected callers (see Detection Guidance).

2. Patch/upgrade steps

   • No patched version is currently identified. Monitor the jshERP project/vendor channel and applied CVSS/NVD records for CVE-2026-94496. When a fixed release is published, upgrade immediately.
   • Because the defect corrupts role/authorization state, after upgrading, audit every role's data-scope setting and review delete/change history for unauthorized modifications.

3. Long-term hardening

   • Adopt deny-by-default authorization with a centralized policy layer so every sensitive endpoint verifies caller permission (eliminate the pattern where the service layer trusts upstream checks).
   • Implement object- and function-level access control tests in CI/CD to catch missing-authorization regressions.
   • Apply role-based least privilege, separate administrative functions from normal user workflows, and require step-up authentication for role/destructive operations.
   • Deploy break-glass/audit logging with alerting for all role and privilege mutations.

References

• NVD — CVE-2026-94496: https://nvd.nist.gov/vuln/detail/CVE-2026-94496
• MITRE CWE-862 — Missing Authorization: https://cwe.mitre.org/data/definitions/862.html
• MITRE ATT&CK T1068 — Exploitation for Privilege Escalation: https://attack.mitre.org/techniques/T1068/
• OWASP — Broken Access Control (A01:2021): https://owasp.org/Top10/A01_2021-Broken_Access_Control/
• CISA Known Exploited Vulnerabilities Catalog (check for future inclusion; not currently listed): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

No threat actor campaigns, public proof-of-concept, or exploit-in-the-wild evidence were identified for CVE-2026-94496 in the tracked data at the time of writing.