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UnratedFix available

thunderbird: Fix of 7 CVEs

Type: advisorySources: OSV

- CVE-2026-6757: invalid pointer in wasm debug frames; add DebugEnvironments::onPopWasm to clean up the debug environment on pop - CVE-2026-6761: privilege escalation; enforce prefs for dom TCP and UDP sockets at the parent-process IPC entry points - CVE-2026-6764: out-of-bounds read; validate HID report length in Dualshock4Remapper::ProcessTouchData - CVE-2026-6771: CSP 'strict-dynamic' mitigation bypass; treat XSLT as parser-created so 'strict-dynamic' no longer auto-allows it - CVE-2026-8963: Web Speech spoofing; cancel SpeechSynthesis on navigation by overriding DisconnectFromOwner - CVE-2026-8965: information disclosure; pass the right sanitization kind through SanitizeInlineStyle (conditional CSS) - CVE-2026-8971: Networking JAR same-origin bypass; reject jar entry names containing an embedded NUL

Products
thunderbird
Affected versions
Not specified
Fixed versions
115.4.1-1.el9_2.alma.tuxcare.els7
CVEs
CVE-2026-6757, CVE-2026-6761, CVE-2026-6764, CVE-2026-6771, CVE-2026-8963, CVE-2026-8965, CVE-2026-8971
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 10:40 UTC · Revision 1

Source evidence

thunderbird: Fix of 7 CVEs

core-osv · Original source

Published 11 Jun 2026, 19:07 UTC

- CVE-2026-6757: invalid pointer in wasm debug frames; add DebugEnvironments::onPopWasm to clean up the debug environment on pop - CVE-2026-6761: privilege escalation; enforce prefs for dom TCP and UDP sockets at the parent-process IPC entry points - CVE-2026-6764: out-of-bounds read; validate HID report length in Dualshock4Remapper::ProcessTouchData - CVE-2026-6771: CSP 'strict-dynamic' mitigation bypass; treat XSLT as parser-created so 'strict-dynamic' no longer auto-allows it - CVE-2026-8963: Web Speech spoofing; cancel SpeechSynthesis on navigation by overriding DisconnectFromOwner - CVE-2026-8965: information disclosure; pass the right sanitization kind through SanitizeInlineStyle (conditional CSS) - CVE-2026-8971: Networking JAR same-origin bypass; reject jar entry names containing an embedded NUL

osv:CLSA-2026-1781204847

thunderbird

Fixed versions: 115.4.1-1.el9_2.alma.tuxcare.els7

Complete source record
{
  "id": "9a5c705be5db6388a4e13357001e6c53433feb9874eb84ea5c39873fb4e92a91",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1781204847",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "thunderbird: Fix of 7 CVEs",
    "summary": "- CVE-2026-6757: invalid pointer in wasm debug frames; add DebugEnvironments::onPopWasm to clean up the debug environment on pop - CVE-2026-6761: privilege escalation; enforce prefs for dom TCP and UDP sockets at the parent-process IPC entry points - CVE-2026-6764: out-of-bounds read; validate HID report length in Dualshock4Remapper::ProcessTouchData - CVE-2026-6771: CSP 'strict-dynamic' mitigation bypass; treat XSLT as parser-created so 'strict-dynamic' no longer auto-allows it - CVE-2026-8963: Web Speech spoofing; cancel SpeechSynthesis on navigation by overriding DisconnectFromOwner - CVE-2026-8965: information disclosure; pass the right sanitization kind through SanitizeInlineStyle (conditional CSS) - CVE-2026-8971: Networking JAR same-origin bypass; reject jar entry names containing an embedded NUL",
    "evidence": "osv:CLSA-2026-1781204847",
    "products": [
      {
        "name": {
          "value": "thunderbird",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "115.4.1-1.el9_2.alma.tuxcare.els7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1781204847",
      "aliases": [
        "CLSA-2026-1781204847"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "115.4.1-1.el9_2.alma.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "thunderbird",
            "purl": "pkg:rpm/tuxcare/thunderbird?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1781204847.json"
          }
        }
      ],
      "modified": "2026-10-26T09:30:20.290785421Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-6757",
        "CVE-2026-6761",
        "CVE-2026-6764",
        "CVE-2026-6771",
        "CVE-2026-8963",
        "CVE-2026-8965",
        "CVE-2026-8971"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1781204847.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6757",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6761",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6764",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6771",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-8963",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-8965",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-8971"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-6757",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-6761",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-6764",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-6771",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-8963",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-8965",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-8971",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 446978,
  "published_at": "2026-06-11T19:07:55+00:00"
}