Low severity · published May 25, 2026
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
3.7
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
1.6.0 before 1.6.16; 1.7.0 before 1.7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48847
github.com
https://github.com/roundcube/roundcubemail/commit/703318e6a59515b73b0d8aa2a91e346b02f56baa
github.com
https://github.com/roundcube/roundcubemail/commit/a4eb375b98cc3d055de665c34efc729dd8ef272a
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
roundcube.net
https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
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