CVE-2026-114729

Medium 5.3

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a remote content blocking bypass. rcube_washtml inspected the SVG SMIL animation attributes `to`, `from` and values for URIs, but not `by`; so markup such as in an HTML message caused remote content to be loaded without the user's consent, disclosing the client IP address and confirming that the message was opened. Upstream fixed this in the commit “Fix remote-content blocker bypass via SVG SMIL `by` attribute”.

Assigner
mitre
Published
2026-10-22
Updated
2026-10-22
Reserved
2026-10-22

Scores

SourceCVSSScoreSeverityVector
mitre3.15.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses

Affected

VendorProductVersions
Roundcube Webmail 1.6.0 to < 1.6.20 (affected)
1.7.0 to < 1.7.5 (affected)
others: unaffected

References

Full CVE JSON record (5.2)

API · GitHub · cve.org

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Webmail",
          "repo": "https://github.com/roundcube/roundcubemail/",
          "vendor": "Roundcube",
          "versions": [
            {
              "lessThan": "1.6.20",
              "status": "affected",
              "version": "1.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.7.5",
              "status": "affected",
              "version": "1.7.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.6.20",
                  "versionStartIncluding": "1.6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.7.5",
                  "versionStartIncluding": "1.7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a remote content blocking bypass. rcube_washtml inspected the SVG SMIL animation attributes `to`, `from` and values for URIs, but not `by`; so markup such as in an HTML message caused remote content to be loaded without the user\u0027s consent, disclosing the client IP address and confirming that the message was opened. Upstream fixed this in the commit \u201cFix remote-content blocker bypass via SVG SMIL `by` attribute\u201d."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-184",
              "description": "CWE-184 Incomplete List of Disallowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-22T02:05:39.669Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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        {
          "tags": [
            "issue-tracking",
            "third-party-advisory"
          ],
          "url": "https://bugs.debian.org/1151279"
        },
        {
          "tags": [
            "patch"
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          "url": "https://github.com/roundcube/roundcubemail/commit/96d993b4ac57166a094b5774f4761e0b905d9a05"
        },
        {
          "tags": [
            "vendor-advisory",
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          "url": "https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5"
        },
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          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.5"
        },
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          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.20"
        },
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          "url": "https://github.com/roundcube/roundcubemail/commit/2b6ff79d8b14f94b0ff04765b7f02dbfdfe98efa"
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    "assignerShortName": "mitre",
    "cveId": "CVE-2026-114729",
    "datePublished": "2026-10-22T02:05:39.669Z",
    "dateReserved": "2026-10-22T02:05:39.353Z",
    "dateUpdated": "2026-10-22T02:05:39.669Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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