Roundcube Webmail vulnerabilities: known CVEs & security history
Roundcube · Web application · 14 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Roundcube Webmail release lines — 14 in total. A CVE here doesn't mean your version is affected — check Roundcube Webmail's current status and the safe version to run.
Known Roundcube Webmail CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-54433 | high | 7.2 | 0% | 2026 |
| CVE-2026-62643 | high | 7.2 | 0% | 2026 |
| CVE-2026-62644 | medium | 6.4 | 0% | 2026 |
| CVE-2026-35539 | medium | 6.1 | 0% | 2026 |
| CVE-2026-35540 | medium | 5.4 | 0% | 2026 |
| CVE-2026-35545 | medium | 5.3 | 0% | 2026 |
| CVE-2026-35544 | medium | 5.3 | 0% | 2026 |
| CVE-2026-35543 | medium | 5.3 | 0% | 2026 |
| CVE-2026-35542 | medium | 5.3 | 0% | 2026 |
| CVE-2026-62642 | medium | 4.3 | 0% | 2026 |
| CVE-2026-62641 | medium | 4.3 | 0% | 2026 |
| CVE-2026-35541 | medium | 4.2 | 0% | 2026 |
| CVE-2026-35537 | low | 3.7 | 0% | 2026 |
| CVE-2026-35538 | low | 3.1 | 0% | 2026 |
Is my Roundcube Webmail 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 Roundcube Webmail version → · Monitor Roundcube Webmail for new CVEs →
Roundcube Webmail vulnerabilities — frequently asked
How many known vulnerabilities does Roundcube Webmail have?
IsItPatched tracks 14 CVEs for Roundcube Webmail. 0 are critical-severity and 2 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Roundcube Webmail have any actively-exploited vulnerabilities?
None of Roundcube Webmail'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 Roundcube Webmail vulnerability?
Among tracked issues, CVE-2026-54433 (HIGH, CVSS 7.2) ranks highest — a Cross-site scripting (XSS) weakness.
Is Roundcube Webmail safe to use?
It depends on the version. The latest supported Roundcube Webmail 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: Roundcube Webmail security status · Roundcube Webmail end-of-life · actively-exploited CVEs. Always verify against Roundcube's advisories — see our disclaimer.