Vulnerability-Lookup

OPENSUSE-SU-2026:10128-1

Vulnerability from csaf_opensuse - Published: 2026-01-31 00:00 - Updated: 2026-01-31 00:00

Summary

MozillaThunderbird-140.7.1-1.1 on GA media

Notes

Title of the patch

MozillaThunderbird-140.7.1-1.1 on GA media

Description of the patch

These are all security issues fixed in the MozillaThunderbird-140.7.1-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames

openSUSE-Tumbleweed-2026-10128

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-0818",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-0818"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird \u003c 147.0.1 and Thunderbird \u003c 140.7.1.",
          "title": "CVE description"
        }
      ],
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-0818",
          "url": "https://www.suse.com/security/cve/CVE-2026-0818"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1257397 for CVE-2026-0818",
          "url": "https://bugzilla.suse.com/1257397"
        }
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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            "openSUSE Tumbleweed:MozillaThunderbird-translations-other-140.7.1-1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "openSUSE Tumbleweed:MozillaThunderbird-140.7.1-1.1.aarch64",
            "openSUSE Tumbleweed:MozillaThunderbird-140.7.1-1.1.ppc64le",
            "openSUSE Tumbleweed:MozillaThunderbird-140.7.1-1.1.s390x",
            "openSUSE Tumbleweed:MozillaThunderbird-140.7.1-1.1.x86_64",
            "openSUSE Tumbleweed:MozillaThunderbird-openpgp-librnp-140.7.1-1.1.aarch64",
            "openSUSE Tumbleweed:MozillaThunderbird-openpgp-librnp-140.7.1-1.1.ppc64le",
            "openSUSE Tumbleweed:MozillaThunderbird-openpgp-librnp-140.7.1-1.1.s390x",
            "openSUSE Tumbleweed:MozillaThunderbird-openpgp-librnp-140.7.1-1.1.x86_64",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-common-140.7.1-1.1.aarch64",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-common-140.7.1-1.1.ppc64le",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-common-140.7.1-1.1.s390x",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-common-140.7.1-1.1.x86_64",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-other-140.7.1-1.1.aarch64",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-other-140.7.1-1.1.ppc64le",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-other-140.7.1-1.1.s390x",
            "openSUSE Tumbleweed:MozillaThunderbird-translations-other-140.7.1-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-01-31T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-0818"
    }
  ]
}

CVE-2026-0818 (GCVE-0-2026-0818)

Vulnerability from cvelistv5 – Published: 2026-01-28 07:39 – Updated: 2026-02-04 09:14

Title

CSS-based exfiltration of the content from partially encrypted emails when allowing remote content

Summary

When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.

Severity ?

4.3 (Medium)


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

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-352 - Cross-Site Request Forgery (CSRF)
CWE-116 - Improper Encoding or Escaping of Output

Assigner

mozilla

References

URL

Tags

	https://bugzilla.mozilla.org/show_bug.cgi?id=1881530
	https://www.mozilla.org/security/advisories/mfsa2…
	https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

Vendor

Product

Version

Mozilla

Thunderbird

Affected: unspecified , < 147.0.1 (custom)

Mozilla

Thunderbird

Affected: unspecified , < 140.7.1 (custom)

Credits

Leon Trampert, Daniel Weber, Christian Rossow, Michael Schwarz

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-0818",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-28T16:50:27.156500Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-200",
                "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-352",
                "description": "CWE-352 Cross-Site Request Forgery (CSRF)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-116",
                "description": "CWE-116 Improper Encoding or Escaping of Output",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-28T16:51:16.955Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-02-04T09:14:40.545Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2026/02/msg00005.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "147.0.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "140.7.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Leon Trampert, Daniel Weber, Christian Rossow, Michael Schwarz"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird \u003c 147.0.1 and Thunderbird \u003c 140.7.1."
            }
          ],
          "value": "When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird \u003c 147.0.1 and Thunderbird \u003c 140.7.1."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-31T15:11:09.535Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1881530"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-07/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-08/"
        }
      ],
      "title": "CSS-based exfiltration of the content from partially encrypted emails when allowing remote content"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-01-28T07:39:17.467Z",
    "dateReserved": "2026-01-09T16:32:39.712Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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

OPENSUSE-SU-2026:10128-1

CVE-2026-0818 (GCVE-0-2026-0818)

Tags

Sightings

Nomenclature