CVE-2026-48843 (GCVE-0-2026-48843)

Vulnerability from cvelistv5 – Published: 2026-05-25 19:11 – Updated: 2026-05-25 19:32
VLAI
Summary
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
Roundcube Webmail Affected: 1.6.14 , < 1.6.16 (semver)
Affected: 1.7.0 , < 1.7.1 (semver)
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Show details on NVD website
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          "product": "Webmail",
          "vendor": "Roundcube",
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            },
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              "status": "affected",
              "version": "1.7.0",
              "versionType": "semver"
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
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        "dateUpdated": "2026-05-25T19:32:10.818Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
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        {
          "url": "https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1"
        },
        {
          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.1"
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          "url": "https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b19618db283923a"
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        {
          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.16"
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      "x_generator": {
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  "cveMetadata": {
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    "datePublished": "2026-05-25T19:11:04.351Z",
    "dateReserved": "2026-05-25T19:11:03.274Z",
    "dateUpdated": "2026-05-25T19:32:10.818Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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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

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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.



Detection rules are retrieved from Rulezet.