---
id: CVE-2026-82587
title: A vulnerability was determined in Open5GS up to 2.7.7
summary: >-
  A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability
  affects the function amf_namf_comm_decode_ue_mm_context_list of the file
  src/amf/namf-handler.c of the component AMF. This manipulation of the argument
  ueContext.m…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-119
published: '2026-08-30'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82587'
references:
  - url: 'https://github.com/open5gs/open5gs/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/issues/4398'
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/releases/tag/v2.8.0'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-82587'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/891890'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/397082'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/397082/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-08-31T02:00:58.597Z'
epss: 0.0031
epssPercentile: 0.24027
---

## Overview

A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function amf_namf_comm_decode_ue_mm_context_list of the file src/amf/namf-handler.c of the component AMF. This manipulation of the argument ueContext.mmContextList[*].allowedNssai causes memory corruption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.8.0 is able to resolve this issue. Patch name: abf8a836564b966b5141110fc25ed413c4f17522. It is recommended to upgrade the affected component.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.