Summary iPlain-English security verdict for Flink, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Flink currently scores 20/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2020-17519. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
Disclosure trend iNew CVEs published for Flink 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-2020-17519 HIGH exploited CWE-552 EPSS 98% → fixed in 1.11.3 CVE-2020-17518 HIGH Path traversal EPSS 52% → fixed in 1.11.3Get alerted about Flink
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Frequently asked
Is Flink safe and patched?
Flink currently scores 20/100 — critical, with active exploitation. 1 of its known vulnerability is being actively exploited in the wild (CISA KEV), including CVE-2020-17519. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
What should I do about Flink now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Apache's official advisory. Some issues are under active exploitation, so treat this as urgent.
Why is Flink listed on IsItPatched?
Flink was added automatically because CISA's Known Exploited Vulnerabilities (KEV) catalog flagged it as actively exploited in the wild. IsItPatched tracks its known CVEs, severity (CVSS), exploitation probability (EPSS) and KEV status from public data; its version and lifecycle mapping is verified over time.
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 Apache's official advisory before you patch or upgrade.