Contour vulnerabilities: known CVEs & security history
Project Contour · Cloud / Ingress · 5 tracked CVEs · 1 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Contour release lines — 5 in total, with 1 actively exploited in the wild. A CVE here doesn't mean your version is affected — check Contour's current status and the safe version to run.
Known Contour CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2023-44487⚡ exploited | high | 7.5 | 100% | 2023 |
| CVE-2024-36539 | critical | 9.8 | 1% | 2024 |
| CVE-2021-32783 | high | 8.5 | 1% | 2021 |
| CVE-2026-41246 | high | 8.1 | 0% | 2026 |
| CVE-2020-15127 | high | 7.5 | 1% | 2020 |
Is my Contour 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 Contour version → · Monitor Contour for new CVEs →
Contour vulnerabilities — frequently asked
How many known vulnerabilities does Contour have?
IsItPatched tracks 5 CVEs for Contour, 1 of which is actively exploited (CISA KEV). 1 is critical-severity and 4 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Contour have any actively-exploited vulnerabilities?
Yes — 1 Contour CVE is in CISA's Known Exploited Vulnerabilities catalog, meaning it is confirmed exploited in the wild. Patch it as a priority.
What is the most severe Contour vulnerability?
Among tracked issues, CVE-2023-44487 (HIGH, CVSS 7.5), which is actively exploited, ranks highest — a Uncontrolled resource consumption weakness.
Is Contour safe to use?
It depends on the version. The latest supported Contour release (1.33.5) 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: Contour security status · Contour end-of-life · actively-exploited CVEs. Always verify against Project Contour's advisories — see our disclaimer.