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CVE-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 write operations by unauthenticated attackers via crafted session data.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:93c8d10b09b1e27025e206b83760892b83e41ec92c83324728dd593bb0599d5f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Webmail","vendor":"Roundcube","versions":[{"lessThan":"1.5.14","status":"affected","version":"0","versionType":"semver"},{"lessThan":"1.6.14","status":"affected","version":"1.6.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/04/11/6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/adp/1/references/0
{"url":"https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/6
{"url":"https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/2
{"url":"https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/4
{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/5
{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/3
{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/1
{"url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d3ca20606ca9e2c944c6093992d29596bfef1b5bdb2f46e7451f93cef83ba120 · sha256:ab939ab06a57f070… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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