Vulnerability Report

CVE-2026-50045

Title: DoS (Resource Amplification Bypass)

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-50045.

CWE Category CWE-406

Published Date Jul 22, 2026

Modified Date Jul 24, 2026

Exploit Status Not Found

Score 5.3 CVSS v3.1

Exploit Probability (EPSS)

0.28%

Vulnerability Summary

CVE-2026-50045: In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.

Impacted Vendors

nlnetlabs 1

fedoraproject 1

Reference Links

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50045.txt

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.3

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-50045 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

July 24, 2026 MODIFIED

Vulnerability data updated via NVD.

July 22, 2026 MODIFIED

Vulnerability data updated via NVD.

July 22, 2026 MODIFIED

Vulnerability data updated via NVD.

July 22, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Stack

No specific products linked.