Lua vulnerabilities: known CVEs & security history
Lua · Language / Runtime · 17 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Lua release lines — 17 in total. A CVE here doesn't mean your version is affected — check Lua's current status and the safe version to run.
Known Lua CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2020-15889 | critical | 9.8 | 2% | 2020 |
| CVE-2022-28805 | critical | 9.1 | 3% | 2022 |
| CVE-2020-15888 | high | 8.8 | 2% | 2020 |
| CVE-2020-24342 | high | 7.8 | 1% | 2020 |
| CVE-2021-45985 | high | 7.5 | 1% | 2023 |
| CVE-2022-33099 | high | 7.5 | 2% | 2022 |
| CVE-2021-32918 | high | 7.5 | 2% | 2021 |
| CVE-2020-24369 | high | 7.5 | 2% | 2020 |
| CVE-2019-6706 | high | 7.5 | 17% | 2019 |
| CVE-2021-44964 | medium | 6.3 | 1% | 2022 |
| CVE-2021-32921 | medium | 5.9 | 2% | 2021 |
| CVE-2021-44647 | medium | 5.5 | 0% | 2022 |
| CVE-2021-43519 | medium | 5.5 | 1% | 2021 |
| CVE-2020-15945 | medium | 5.5 | 1% | 2020 |
| CVE-2020-24371 | medium | 5.3 | 2% | 2020 |
| CVE-2020-24370 | medium | 5.3 | 4% | 2020 |
| CVE-2014-5461 | medium | 5 | 12% | 2014 |
Is my Lua 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 Lua version → · Monitor Lua for new CVEs →
Lua vulnerabilities — frequently asked
How many known vulnerabilities does Lua have?
IsItPatched tracks 17 CVEs for Lua. 2 are critical-severity and 7 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Lua have any actively-exploited vulnerabilities?
None of Lua'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 Lua vulnerability?
Among tracked issues, CVE-2020-15889 (CRITICAL, CVSS 9.8) ranks highest — a Out-of-bounds read weakness.
Is Lua safe to use?
It depends on the version. The latest supported Lua release (5.5.0) 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: Lua security status · Lua end-of-life · actively-exploited CVEs. Always verify against Lua's advisories — see our disclaimer.