Memory Corruption Vulnerability in Open5GS AMF Component
CVE-2026-82587

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
30 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82587?

A vulnerability has been identified in Open5GS versions up to 2.7.7, specifically within the AMF component. The issue arises from the amf_namf_comm_decode_ue_mm_context_list function, where improper handling of the ueContext.mmContextList[*].allowedNssai parameter may lead to memory corruption, allowing remote attackers to potentially exploit the vulnerability. Upgrading to version 2.8.0 resolves this security concern. Users are advised to implement the available patch, identified by commit abf8a836564b966b5141110fc25ed413c4f17522, to mitigate potential exploitation.

Affected Version(s)

Open5GS 2.7.0

Open5GS 2.7.1

Open5GS 2.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82587 - Proof of Concept

References

https://vuldb.com/vuln/397082
vdb-entrytechnical-description
https://vuldb.com/vuln/397082/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82587
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ZiyuLin (VulDB User)
.