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Vulnerability Detail

CVE-2026-49303UPDATED Verified Sceawere Triage Sources: NVD / CISA KEV

Notification Module Permission Control Vulnerability

Vulnerability Metadata

Severity
Medium
Score / CVSS
5.1
Creation Date
4h ago
Vendor
Huawei
Product
HarmonyOS
Attack Type
CWE-264 Permissions, Privileges, and Access Controls
Vector String
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack Complexity
LOW

Narrative and Response

Description

Permission control vulnerability in the notification module. Impact: Successful exploitation of this vulnerability may affect availability.

Executive Summary

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Technical Details

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Mitigations

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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References

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Additional Metadata

{
  "score": "5.1",
  "pubDate": "2026-08-17T09:17:30.270Z",
  "pubdate": "2026-08-17T09:17:30.270Z",
  "executiveSummary": "A permission control vulnerability has been identified within the notification module of the affected software system. This security defect arises from improper authorization enforcement, allowing unauthorized entities to interact with sensitive functional components.\nSuccessful exploitation of this vulnerability directly impacts system availability, potentially leading to denial-of-service conditions or disruption of critical messaging and notification services.\nThe affected system component is strictly limited to the internal notification module, where access controls fail to properly validate user permissions prior to executing notification-related operations.\nFrom a risk perspective, this vulnerability introduces operational risks by leaving core communication workflows exposed to unauthorized manipulation, which can degrade system reliability and availability.\nAttacker capabilities in this scenario involve the potential execution of unauthorized actions against the notification module, assuming network or interface reachability to the vulnerable endpoint.\nExploitation requirements depend on the ability of an untrusted actor to interact with the inadequately secured permission boundaries of the notification module without possessing the requisite administrative or operational privileges.",
  "technicalDetails": "The root cause of this vulnerability lies in insufficient permission checks and authorization logic within the notification module. The application fails to adequately verify whether the requesting entity holds the necessary privileges to invoke specific functions or access restricted notification resources.\nThe vulnerable component is explicitly localized to the notification module codebase, specifically within the authorization and access control routines that govern incoming requests or internal functional calls.\nExploitation occurs when an unauthorized or under-privileged actor interacts directly with the notification module. Because the underlying access control mechanisms lack strict validation, the application processes the request despite the absence of valid authorization tokens or appropriate role assignments.\nThe attack flow typically involves identifying reachable interfaces or functions within the notification module, crafting requests designed to trigger resource-intensive or disruptive operations, and transmitting these payloads to the vulnerable component.\nUpon receiving the request, the flawed authorization logic bypasses standard security checks, allowing the payload or operation to execute directly against the notification processing pipeline.\nPost-exploitation impact is primarily concentrated on availability, where repeated or maliciously crafted interactions can overwhelm the notification module, exhaust system resources, or trigger application faults that disrupt normal messaging services.\nNetwork exposure, authentication requirements, privilege requirements, and specific affected version identifiers remain contingent on the specific deployment context, as no explicit version numbers, protocols, or file paths were provided in the input.\nPayload behavior centers on leveraging the authorization bypass to trigger unintended state changes, resource consumption, or operational failures within the notification subsystem."
}
CVE-2026-49303: Notification Module Permission Control Vulnerability (MEDIUM Severity, CVSS: 5.1) - Sceawere