Public mode

No access to your tenant or devices. Every item links to its source. What this means

CVE-2026-91855

Open5GS PFCP Message handler.c denial of service

CVSS 4.0 6.9 MEDIUMCVSS 3.1 5.3 MEDIUMCVSS 3.0 5.3 MEDIUMCVSS 2.0 5.0 Check source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-91855

Published

A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this vulnerability is an unknown functionality of the file lib/pfcp/handler.c of the component PFCP Message Handler. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The patch is named 028e1dbb5e3271035ccee906ef417a97fc523f71. Applying a patch is the recommended action to fix this issue. CVE-2025-29339 describes a different assertion failure vulnerability in Open5GS UPF.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91855

Published

Open5GS

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "n/a",
                    "product": "Open5GS",
                    "versions": [
                        {
                            "version": "2.7.0",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.1",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.2",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.3",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.4",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.5",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.6",
                            "status": "affected"
                        },
                        {
                            "version": "2.7.7",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"
                    ],
                    "modules": [
                        "PFCP Message Handler"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON