Is this vulnerability remotely exploitable?

Yes. Any actor that can send HTTP GET requests to the NRF discovery API and include a crafted `group-id-list` parameter can attempt to exploit this vulnerability to crash the service.

What level of access does an attacker need?

The attacker needs network-level access to the NRF discovery endpoint. This could be from within the same Kubernetes cluster, a service mesh, or any environment where the NRF API is reachable; no additional authentication bypass is described for triggering the crash.

What is the safest general fix pattern?

The safest pattern is to comprehensively validate all externally controlled inputs before use, especially when splitting strings or indexing into slices. Ensure that functions like `EncodeGroupId` verify the length and format of parsed data, handle malformed input gracefully, and avoid assumptions about parameter structure.

Severity:

HIGH RISK

(7.5)

Improper Input Validation Leading to DoS in free5GC NRF Discovery Service

CVE-2026-33062

Published:

Mar 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-284

Impact:

Denial of Service

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-284

Impact:

Denial of Service

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Improper Input Validation Leading to DoS in free5GC NRF Discovery Service

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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