CVE Explorer

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b9efe30fe444fd5ad4fb90b55056707b1c73c3bcc47c074bff97a066ac813282

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Unbound","vendor":"NLnet Labs","versions":[{"lessThan":"1.25.2","status":"affected","version":"1.22.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:08eb9979315d0239f16a629016d2bf30152487c5a0c7a250aae72faa54cf461e · sha256:b5bb7b70551e4ad4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:08eb9979315d0239f16a629016d2bf30152487c5a0c7a250aae72faa54cf461e · sha256:b5bb7b70551e4ad4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-406","description":"CWE-406: Insufficient Control of Network Message Volume (Network Amplification)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:08eb9979315d0239f16a629016d2bf30152487c5a0c7a250aae72faa54cf461e · sha256:b5bb7b70551e4ad4… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["vendor-advisory"],"url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50045.txt"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:08eb9979315d0239f16a629016d2bf30152487c5a0c7a250aae72faa54cf461e · sha256:b5bb7b70551e4ad4… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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