---
id: CVE-2026-116543
title: Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser
summary: >-
  Open5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability
  in parse_multipart() that allows unauthenticated attackers to corrupt memory
  by supplying an empty multipart boundary. Attackers can send a single crafted
  mult…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: open5gs
product: open5gs
affected:
  - open5gs >= 1.3.0 <= 2.8.0
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T14:59:42.212Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116543'
references:
  - url: 'https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g'
    label: GitHub Security Advisory (GHSA-25v2-v588-jq8g)
  - url: >-
      https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df
    label: Patch Commit
  - url: 'https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372'
  - url: >-
      https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260
  - url: 'https://github.com/open5gs/open5gs'
  - url: >-
      https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser
    label: >-
      VulnCheck Advisory: Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write
      via SBI Multipart Parser
tags:
  - cve.org
ingestedAt: '2026-10-26T15:29:30.500Z'
---

## Overview

Open5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability in parse_multipart() that allows unauthenticated attackers to corrupt memory by supplying an empty multipart boundary. Attackers can send a single crafted multipart/related request to the SBI interface of any network function, overflowing the lookbehind buffer and crashing it.

## Affected

- `open5gs >= 1.3.0 <= 2.8.0`

## Remediation

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