---
id: CVE-2026-106806
title: A memory exhaustion issue exists in Open5GS v2.8.0 in the HTTP/2 SBI server
summary: >-
  A memory exhaustion issue exists in Open5GS v2.8.0 in the HTTP/2 SBI server.
  Repeated header names cause previously allocated header strings to be leaked,
  and HPACK compression allows an unauthenticated remote attacker to trigger
  tens of…
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: adp
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-05T16:33:27.295265Z'
exploitAvailable: true
published: '2026-11-02'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T16:34:18.009Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-106806'
references:
  - url: 'https://github.com/open5gs/open5gs/issues/4788'
  - url: >-
      https://github.com/open5gs/open5gs/commit/76f15375ead1b2db09193458e56640da0a86c255
  - url: 'https://gist.github.com/hackeryounow/c923fad9de83011004bd7d078b817dc0'
tags:
  - cve.org
  - exploit-available
epss: 0.00436
epssPercentile: 0.38148
ingestedAt: '2026-11-05T22:38:31.365Z'
---

## Overview

A memory exhaustion issue exists in Open5GS v2.8.0 in the HTTP/2 SBI server. Repeated header names cause previously allocated header strings to be leaked, and HPACK compression allows an unauthenticated remote attacker to trigger tens of thousands of duplicate headers with a small request. Repeated crafted requests can cause persistent heap growth, exhaust process memory, and terminate the affected Open5GS network function, resulting in denial of service.

## Remediation

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