---
id: CVE-2026-78156
title: A security vulnerability has been detected in Open5GS 2.8.0
summary: >-
  A security vulnerability has been detected in Open5GS 2.8.0. Affected by this
  issue is the function hss_ogs_diam_s6a_air_cb of the file
  src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request
  Handler. Such manipula…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L'
cwe:
  - CWE-119
  - CWE-122
published: '2026-08-24'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78156'
references:
  - url: 'https://github.com/open5gs/open5gs/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/issues/4661'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-78156'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/882951'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/394539'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/394539/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00561
epssPercentile: 0.45166
ingestedAt: '2026-10-14T13:30:58.553Z'
---

## Overview

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hss_ogs_diam_s6a_air_cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer overflow. The attack may be performed from remote. The name of the patch is a9c82ee0b590d76a581b0580cb46b598984e2392. A patch should be applied to remediate this issue.

## Remediation

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