Vulnerability-Lookup

GHSA-2HWW-8583-W9WF

Vulnerability from github – Published: 2026-05-26 13:30 – Updated: 2026-05-26 13:30

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-48843"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-25T20:16:36Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-2hww-8583-w9wf",
  "modified": "2026-05-26T13:30:49Z",
  "published": "2026-05-26T13:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48843"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b19618db283923a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147c176ebf5a1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.1"
    },
    {
      "type": "WEB",
      "url": "https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-25 19:11 – Updated: 2026-05-26 12:50

Summary

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

mitre

References

5 references

URL	Tags
https://roundcube.net/news/2026/05/24/security-up…
https://github.com/roundcube/roundcubemail/releas…
https://github.com/roundcube/roundcubemail/commit…
https://github.com/roundcube/roundcubemail/releas…
https://github.com/roundcube/roundcubemail/commit…

Impacted products

1 product

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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JSON

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-48843",
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                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-26T12:50:34.552140Z",
                "version": "2.0.3"
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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.

Action not permitted

GHSA-2HWW-8583-W9WF

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

Tags

Sightings

Nomenclature