Bootstrap vulnerabilities: known CVEs & security history
Bootstrap · Web / UI · 7 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Bootstrap release lines — 7 in total. A CVE here doesn't mean your version is affected — check Bootstrap's current status and the safe version to run.
Known Bootstrap CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2019-8331 | medium | 6.1 | 17% | 2019 |
| CVE-2018-20677 | medium | 6.1 | 4% | 2019 |
| CVE-2018-20676 | medium | 6.1 | 4% | 2019 |
| CVE-2016-10735 | medium | 6.1 | 4% | 2019 |
| CVE-2018-14042 | medium | 6.1 | 4% | 2018 |
| CVE-2018-14041 | medium | 6.1 | 4% | 2018 |
| CVE-2018-14040 | medium | 6.1 | 4% | 2018 |
Is my Bootstrap 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 Bootstrap version → · Monitor Bootstrap for new CVEs →
Bootstrap vulnerabilities — frequently asked
How many known vulnerabilities does Bootstrap have?
IsItPatched tracks 7 CVEs for Bootstrap. 0 are critical-severity and 0 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Bootstrap have any actively-exploited vulnerabilities?
None of Bootstrap'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 Bootstrap vulnerability?
Among tracked issues, CVE-2019-8331 (MEDIUM, CVSS 6.1) ranks highest — a Cross-site scripting (XSS) weakness.
Is Bootstrap safe to use?
It depends on the version. The latest supported Bootstrap release (5.3.8) 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: Bootstrap security status · Bootstrap end-of-life · actively-exploited CVEs. Always verify against Bootstrap's advisories — see our disclaimer.