Squid vulnerabilities: known CVEs & security history
Squid · Proxy · 5 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Squid release lines — 5 in total. A CVE here doesn't mean your version is affected — check Squid's current status and the safe version to run.
Known Squid CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2023-46847 | high | 8.6 | 88% | 2023 |
| CVE-2026-33526 | high | 7.5 | 9% | 2026 |
| CVE-2026-32748 | high | 7.5 | 9% | 2026 |
| CVE-2026-47729 | medium | 6.5 | 2% | 2026 |
| CVE-2026-50012 | medium | 5.5 | 2% | 2026 |
Is my Squid 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 Squid version → · Monitor Squid for new CVEs →
Squid vulnerabilities — frequently asked
How many known vulnerabilities does Squid have?
IsItPatched tracks 5 CVEs for Squid. 0 are critical-severity and 3 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Squid have any actively-exploited vulnerabilities?
None of Squid'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 Squid vulnerability?
Among tracked issues, CVE-2023-46847 (HIGH, CVSS 8.6) ranks highest — a Buffer overflow weakness.
Is Squid safe to use?
It depends on the version. The latest supported Squid release 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: Squid security status · Squid end-of-life · actively-exploited CVEs. Always verify against Squid's advisories — see our disclaimer.