CVE-2026-35537
unknown
CVSS v3
—
CVSS v2
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VIR risk
—
Description
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-35537
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1.6.5+dfsg-1+deb12u8 |
| debian | bullseye | fixed | 0 |
| debian | sid | fixed | 1.6.14+dfsg-1 |
| debian | trixie | fixed | 1.6.15+dfsg-0+deb13u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | roundcube/roundcubemail | >=1.7-beta,<1.7-rc5 | 1.7-rc5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-35537
- https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3
- https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74
- https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620
- https://github.com/roundcube/roundcubemail
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
- http://www.openwall.com/lists/oss-security/2026/04/11/6
- https://security-tracker.debian.org/tracker/CVE-2026-35537
Verify integrity in audit chain (admin only). AS-IS.