Unrated
Site isolation issue in the Networking component
Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Announced Group revision 1
Original source ↗CVE-2026-109759
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109759
Firefox
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Thunderbird
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Mozilla",
"product": "Firefox",
"versions": [
{
"status": "unaffected",
"version": "153.5",
"versionType": "rpm",
"lessThanOrEqual": "153.*"
},
{
"status": "unaffected",
"version": "158",
"versionType": "rpm",
"lessThanOrEqual": "*"
}
]
},
{
"vendor": "Mozilla",
"product": "Thunderbird",
"versions": [
{
"status": "unaffected",
"version": "153.5",
"versionType": "rpm",
"lessThanOrEqual": "153.*"
},
{
"status": "unaffected",
"version": "158",
"versionType": "rpm",
"lessThanOrEqual": "*"
}
]
}
]- Related CVEs
- CVE-2026-109759
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38810 · Revision 1
- Added to Heist Feed
- Publisher date