CVE-2026-54432 (GCVE-0-2026-54432)

Vulnerability from cvelistv5 – Published: 2026-07-14 16:21 – Updated: 2026-07-14 16:21
VLAI
Summary
Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.
Severity
4.7 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Roundcube Webmail Affected: 1.6.0 , < 1.6.17 (semver)
Affected: 1.7.0 , < 1.7.2 (semver)
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "attackVector": "NETWORK",
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    "assignerShortName": "mitre",
    "cveId": "CVE-2026-54432",
    "datePublished": "2026-07-14T16:21:55.409Z",
    "dateReserved": "2026-06-15T13:27:41.810Z",
    "dateUpdated": "2026-07-14T16:21:55.409Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-54432\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2026-07-14T17:17:05.387\",\"lastModified\":\"2026-07-14T17:17:05.387\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"Roundcube\",\"product\":\"Webmail\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"1.6.0\",\"lessThan\":\"1.6.17\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"1.7.0\",\"lessThan\":\"1.7.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2\",\"source\":\"cve@mitre.org\"}]}}",
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      "current_release_date": "2026-07-14T18:05:07+00:00",
      "cve": "CVE-2026-54432",
      "id": "CVE-2026-54432",
      "initial_release_date": "2026-07-14T16:21:55.409000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "roundcubemail: Roundcube Webmail: Stored Cross-Site Scripting via unescaped attachment MIME type",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54432.json",
      "version": "3"
    }
  }
}



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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.
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  • 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.