Is there a public PoC exploit available for CVE-2026-8783?

Yes, a public proof-of-concept exploit is available for CVE-2026-8783. Prioritise patching immediately. EPSS: 0.0%.

Is there a patch available for CVE-2026-8783?

Yes, a patch is available for CVE-2026-8783. Update the affected software to the latest version immediately.

OMEC AMF CVE-2026-8783

Q: What is the CVSS score of CVE-2026-8783?

CVE-2026-8783 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-30731 LOW

NULL Pointer Dereference (CWE-476)

2026-05-18 VulDB

GHSA-6v92-ph9p-hrpc

Denial Of Service Null Pointer Dereference Amf

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

May 18, 2026 - 04:22 NVD

MEDIUM LOW

CVSS changed

May 18, 2026 - 04:22 NVD

4.3 (MEDIUM) 2.1 (LOW)

Source Code Evidence Fetched

May 18, 2026 - 03:44 vuln.today

Analysis Generated

May 18, 2026 - 03:44 vuln.today

DescriptionCVE.org

A security vulnerability has been detected in omec-project amf up to 2.1.3-dev. This impacts the function UERadioCapabilityCheckResponse of the file ngap/dispatcher.go. Such manipulation leads to null pointer dereference. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 2.2.0 will fix this issue. Upgrading the affected component is advised. The same pull request fixes multiple security issues.

AnalysisAI

Null pointer dereference in OMEC Project AMF (Access and Mobility Management Function) versions up to 2.1.3-dev allows authenticated remote attackers to trigger denial of service via crafted NGAP UERadioCapabilityCheckResponse messages. The vulnerability exists in ngap/dispatcher.go where insufficient null pointer validation permits exploitation through the 5G network interface. Public exploit code exists (GitHub issue #675), and vendor-released patch v2.2.0 is available via PR #666, which also addresses multiple related security issues in NGAP message handling and mobile identity parsing.

Technical ContextAI

OMEC (Open Mobile Evolved Core) AMF implements the 3GPP Access and Mobility Management Function for 5G standalone core networks. The vulnerability (CWE-476) affects the NGAP (NG Application Protocol) dispatcher in ngap/dispatcher.go, specifically in UERadioCapabilityCheckResponse message processing. NGAP is the control-plane protocol between 5G radio access networks (gNB) and the core AMF. The patch evidence shows multiple missing null-pointer checks in dispatcher.go (lines handling sctplbMsg, ran context, connection objects, and NGAP PDUs), plus related input validation failures in gmm/handler.go (PLMN ID parsing from SUCI) and nas/nas_security/security.go (empty MobileIdentity5GSContents). The code serves SCTP-based 5G signaling traffic and metrics telemetry. GitHub PR #666 adds defensive null checks across message ingestion paths and improves UTF-8 validation for Prometheus label values, preventing crashes when malformed or missing data structures are processed.

RemediationAI

Upgrade to OMEC AMF version 2.2.0 or later, confirmed fixed per vendor release tag https://github.com/omec-project/amf/releases/tag/v2.2.0 and pull request https://github.com/omec-project/amf/pull/666. The patch adds null-pointer validation in ngap/dispatcher.go (checks for nil sctplbMsg, ran, conn, pdu before dereferencing), error handling for PLMN ID parsing in gmm/handler.go, and empty-buffer checks in nas/nas_security/security.go. If immediate upgrade is not feasible, implement network-level access controls restricting NGAP SCTP connections to trusted gNB IP addresses only (reduces attack surface to compromised base stations), and enable verbose logging in ngap/dispatcher.go to detect repeated null-pointer errors indicative of exploitation attempts - note this mitigation does not prevent crashes but aids incident detection. Monitor AMF process restarts and correlate with NGAP message types in logs. No configuration-based workaround exists as the bug is in core message processing logic. Patching is strongly recommended as PR #666 addresses multiple related null-pointer and input validation issues beyond this single CVE.