CVE-2026-35537

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Summary

CVECVE-2026-35537
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-03 04:17:10 UTC
Updated2026-04-13 17:54:32 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.000440000 probability, percentile 0.133050000 (date 2026-04-15)

Problem Types: CWE-502 | CWE-502 CWE-502 Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Roundcube Webmail All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Roundcube Webmail affected 1.5.14 semver Not specified
CNA Roundcube Webmail affected 1.6.0 1.6.14 semver Not specified

References

ReferenceSourceLinkTags
roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 [email protected] roundcube.net Third Party Advisory
www.openwall.com/lists/oss-security/2026/04/11/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Issue Tracking, Mailing List
github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd... [email protected] github.com Patch
github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197... [email protected] github.com Patch
github.com/roundcube/roundcubemail/releases/tag/1.6.14 [email protected] github.com Release Notes
github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 [email protected] github.com Release Notes
github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506... [email protected] github.com Patch
github.com/roundcube/roundcubemail/releases/tag/1.5.14 [email protected] github.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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