Summary iPlain-English security verdict for Unbound, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Unbound currently scores 0/100 — critical. No tracked vulnerabilities are currently known to be exploited in the wild. Upgrade promptly to address the open critical vulnerabilities.
Disclosure trend iNew CVEs published for Unbound each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
Most urgent first — actively exploited, then likeliest to be exploited.
CVE-2023-50387 HIGH Resource exhaustion EPSS 100% → fixed in 1.19.1 CVE-2019-25032 CRITICAL Integer overflow EPSS 2% → fixed in 1.9.5 CVE-2019-25034 CRITICAL Integer overflow EPSS 2% → fixed in 1.9.5 CVE-2019-25035 CRITICAL Out-of-bounds write EPSS 2% → fixed in 1.9.5 CVE-2019-25038 CRITICAL Integer overflow EPSS 2% → fixed in 1.9.5 CVE-2019-25039 CRITICAL Integer overflow EPSS 2% → fixed in 1.9.5 CVE-2019-25042 CRITICAL Out-of-bounds write EPSS 2% → fixed in 1.9.5 CVE-2019-25033 CRITICAL Integer overflow EPSS 2% → fixed in 1.9.5 CVE-2026-33278 CRITICAL Use-after-free EPSS 1% → fixed in 1.25.1 CVE-2026-42960 CRITICAL CWE-349 EPSS 0% → fixed in 1.25.1Get alerted about Unbound
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Frequently asked
Is Unbound safe and patched?
Unbound currently scores 0/100 — critical. No tracked vulnerabilities are currently known to be exploited in the wild. Upgrade promptly to address the open critical vulnerabilities.
What should I do about Unbound now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against NLnet Labs's official advisory.
lifecycle unknown — needs latest supported version
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against NLnet Labs's official advisory before you patch or upgrade — Unbound official site ↗