CVE-2026-35537
published 2026-04-03CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.47%
37.5th percentile
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | roundcube | < roundcube 1.6.5+dfsg-1+deb12u8 (bookworm) | roundcube 1.6.5+dfsg-1+deb12u8 (bookworm) |
| roundcube | roundcubemail | >= 1.7-beta < 1.7-rc5 | 1.7-rc5 |
| roundcube | webmail | < 1.5.14 | 1.5.14 |
| roundcube | webmail | >= 1.6.0 < 1.6.14 | 1.6.14 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
osv7.5HIGH
vendor_debian3.7LOW
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Debian
CVE-2026-35537: roundcube - An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe de...
vendor_debian·2026·CVSS 3.7
CVE-2026-35537 [LOW] CVE-2026-35537: roundcube - An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe de...
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Scope: local
bookworm: resolved (fixed in 1.6.5+dfsg-1+deb12u8)
bullseye: resolved
forky: resolved (fixed in 1.6.14+dfsg-1)
sid: resolved (fixed in 1.6.14+dfsg-1)
trixie: resolved (fixed in 1.6.15+dfsg-0+deb13u1)
OSV
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
osv·2026-04-03
CVE-2026-35537 [LOW] Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
GHSA
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
ghsa·2026-04-03
CVE-2026-35537 [LOW] CWE-502 Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
OSV
CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1
osv·2026-04-03·CVSS 7.5
CVE-2026-35537 [HIGH] CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
No detection rules found.
No public exploits indexed.
https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620https://github.com/roundcube/roundcubemail/releases/tag/1.5.14https://github.com/roundcube/roundcubemail/releases/tag/1.6.14https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14http://www.openwall.com/lists/oss-security/2026/04/11/6
2026-04-03
Published