Vulnerability-Lookup

GHSA-VF28-QP34-HHM8

Vulnerability from github – Published: 2026-08-17 15:30 – Updated: 2026-08-17 15:30

Details

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, 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. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.

Severity

5.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-75006"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T13:16:55Z",
    "severity": "MODERATE"
  },
  "details": "In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, 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. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.",
  "id": "GHSA-vf28-qp34-hhm8",
  "modified": "2026-08-17T15:30:40Z",
  "published": "2026-08-17T15:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75006"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.18"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.3"
    },
    {
      "type": "WEB",
      "url": "https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-75006 (GCVE-0-2026-75006)

Vulnerability from cvelistv5 – Published: 2026-08-17 12:56 – Updated: 2026-08-17 14:06

Summary

Severity

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-17 14:06 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

mitre

References

7 references

URL	Tags
https://roundcube.net/news/2026/08/09/security-up…
https://github.com/roundcube/roundcubemail/releas…
https://github.com/roundcube/roundcubemail/commit…
https://github.com/roundcube/roundcubemail/commit…
https://github.com/roundcube/roundcubemail/releas…
https://github.com/roundcube/roundcubemail/commit…
https://github.com/roundcube/roundcubemail/commit…

Impacted products

1 product

Vendor	Product	Version
Roundcube	Webmail	Affected: 1.6.0 , < 1.6.18 (semver) Affected: 1.7.0 , < 1.7.3 (semver) cpe:2.3:a:roundcube:webmail:::::::: cpe:2.3:a:roundcube:webmail::::::::

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75006",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-17T14:06:37.236615Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-17T14:06:46.947Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Webmail",
          "vendor": "Roundcube",
          "versions": [
            {
              "lessThan": "1.6.18",
              "status": "affected",
              "version": "1.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.7.3",
              "status": "affected",
              "version": "1.7.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.6.18",
                  "versionStartIncluding": "1.6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.7.3",
                  "versionStartIncluding": "1.7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      "descriptions": [
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
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          "scenarios": [
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              "lang": "en",
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          "descriptions": [
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              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T12:56:47.427Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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        },
        {
          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.18"
        },
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        },
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        },
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          "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.3"
        },
        {
          "url": "https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00"
        },
        {
          "url": "https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d"
        }
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      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-75006",
    "datePublished": "2026-08-17T12:56:47.427Z",
    "dateReserved": "2026-08-17T12:56:46.553Z",
    "dateUpdated": "2026-08-17T14:06:46.947Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-VF28-QP34-HHM8

CVE-2026-75006 (GCVE-0-2026-75006)

Tags

Sightings

Nomenclature