thunderbird: Fix of 7 CVEs
- 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
- 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"
}