Vulnerability in Roundcube Webmail
CVE-2026-48847
Roundcube Webmail 1.6.x before 1.6.16, and 1.7.x before 1.7.1 allows pre-authentication arbitrary file deletion via redis/memcache session poisoning bypass.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (44.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Roundcube Webmail — versions 1.6.0, 1.7.0
Weakness classification (CWE)
References
- roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
- github.com/roundcube/roundcubemail/releases/tag/1.7.1
- github.com/roundcube/roundcubemail/commit/a4eb375b98cc3d055de665c34efc729dd8ef2…
- github.com/roundcube/roundcubemail/releases/tag/1.6.16
- github.com/roundcube/roundcubemail/commit/703318e6a59515b73b0d8aa2a91e346b02f56…
Frequently asked questions
- What is CVE-2026-48847?
- CVE-2026-48847 is a low-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.7/10. Published 2026-05-25.
- How severe is CVE-2026-48847?
- Low severity. CVSS v3 base score is 3.7 out of 10.