FKIE_CVE-2026-35537
Vulnerability from fkie_nvd - Published: 2026-04-03 04:17 - Updated: 2026-07-24 21:10
Severity
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5 (High) - CVSS:3.1/
Summary
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.
References
{
"affected": [
{
"affectedData": [
{
"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"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
"matchCriteriaId": "40F75FD7-CF6D-4DC4-A33D-625D0F02FAB3",
"versionEndExcluding": "1.5.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
"matchCriteriaId": "AF4B6448-D4F5-4680-B32C-9366630E9485",
"versionEndExcluding": "1.6.14",
"versionStartIncluding": "1.6.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se descubri\u00f3 un problema en Roundcube Webmail antes de las versiones 1.5.14 y 1.6.14. La deserializaci\u00f3n insegura en el gestor de sesiones de redis/memcache puede conducir a operaciones de escritura de archivos arbitrarias por parte de atacantes no autenticados a trav\u00e9s de datos de sesi\u00f3n manipulados."
}
],
"id": "CVE-2026-35537",
"lastModified": "2026-07-24T21:10:00.143",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"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"
},
"exploitabilityScore": 2.2,
"impactScore": 1.4,
"source": "cve@mitre.org",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-35537",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-03T13:11:34.838938Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-04-03T04:17:10.313",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes"
],
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.5.14"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes"
],
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.14"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes"
],
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Mailing List"
],
"url": "http://www.openwall.com/lists/oss-security/2026/04/11/6"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-502"
}
],
"source": "cve@mitre.org",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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