Apache NiFi vulnerabilities: known CVEs & security history
Apache · Data / Integration · 46 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Apache NiFi release lines — 46 in total. A CVE here doesn't mean your version is affected — check Apache NiFi's current status and the safe version to run.
Known Apache NiFi CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2018-1309 | critical | 9.8 | 5% | 2018 |
| CVE-2017-15697 | critical | 9.8 | 5% | 2018 |
| CVE-2017-5636 | critical | 9.8 | 4% | 2017 |
| CVE-2026-39816 | high | 8.8 | 1% | 2026 |
| CVE-2025-66524 | high | 8.8 | 0% | 2025 |
| CVE-2023-36542 | high | 8.8 | 2% | 2023 |
| CVE-2023-34468 | high | 8.8 | 63% | 2023 |
| CVE-2022-33140 | high | 8.8 | 4% | 2022 |
| CVE-2019-12421 | high | 8.8 | 2% | 2019 |
| CVE-2021-20190 | high | 8.1 | 7% | 2021 |
| CVE-2023-49145 | high | 7.9 | 1% | 2023 |
| CVE-2023-22832 | high | 7.5 | 1% | 2023 |
| CVE-2022-29265 | high | 7.5 | 2% | 2022 |
| CVE-2020-9491 | high | 7.5 | 3% | 2020 |
| CVE-2020-9487 | high | 7.5 | 3% | 2020 |
| CVE-2020-9486 | high | 7.5 | 3% | 2020 |
| CVE-2020-1942 | high | 7.5 | 3% | 2020 |
| CVE-2018-17195 | high | 7.5 | 1% | 2018 |
| CVE-2018-17194 | high | 7.5 | 3% | 2018 |
| CVE-2018-1310 | high | 7.5 | 3% | 2018 |
| CVE-2017-12632 | high | 7.5 | 3% | 2018 |
| CVE-2017-5635 | high | 7.5 | 3% | 2017 |
| CVE-2017-7667 | high | 7.5 | 1% | 2017 |
| CVE-2019-10086 | high | 7.3 | 29% | 2019 |
| CVE-2026-25903 | medium | 6.6 | 1% | 2026 |
| CVE-2025-27017 | medium | 6.5 | 1% | 2025 |
| CVE-2023-40037 | medium | 6.5 | 2% | 2023 |
| CVE-2023-34212 | medium | 6.5 | 2% | 2023 |
| CVE-2021-44145 | medium | 6.5 | 2% | 2021 |
| CVE-2019-10080 | medium | 6.5 | 2% | 2019 |
| CVE-2018-17192 | medium | 6.5 | 3% | 2018 |
| CVE-2017-12623 | medium | 6.5 | 2% | 2017 |
| CVE-2020-1933 | medium | 6.1 | 3% | 2020 |
| CVE-2018-17193 | medium | 6.1 | 3% | 2018 |
| CVE-2017-7665 | medium | 6.1 | 4% | 2017 |
| CVE-2020-13940 | medium | 5.5 | 2% | 2020 |
| CVE-2024-56512 | medium | 5.4 | 3% | 2024 |
| CVE-2016-8748 | medium | 5.4 | 2% | 2017 |
| CVE-2020-1928 | medium | 5.3 | 4% | 2020 |
| CVE-2019-10083 | medium | 5.3 | 3% | 2019 |
| CVE-2020-27223 | medium | 5.2 | 78% | 2021 |
| CVE-2017-15703 | medium | 5 | 1% | 2018 |
| CVE-2024-52067 | medium | 4.9 | 1% | 2024 |
| CVE-2024-45477 | medium | 4.6 | 1% | 2024 |
| CVE-2024-37389 | medium | 4.6 | 24% | 2024 |
| CVE-2022-26850 | medium | 4.3 | 1% | 2022 |
Is my Apache NiFi version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Apache NiFi version → · Monitor Apache NiFi for new CVEs →
Apache NiFi vulnerabilities — frequently asked
How many known vulnerabilities does Apache NiFi have?
IsItPatched tracks 46 CVEs for Apache NiFi. 3 are critical-severity and 21 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Apache NiFi have any actively-exploited vulnerabilities?
None of Apache NiFi's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Apache NiFi vulnerability?
Among tracked issues, CVE-2018-1309 (CRITICAL, CVSS 9.8) ranks highest — a XML external entity (XXE) weakness.
Is Apache NiFi safe to use?
It depends on the version. The latest supported Apache NiFi release (2.9.0) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Apache NiFi security status · Apache NiFi end-of-life · actively-exploited CVEs. Always verify against Apache's advisories — see our disclaimer.