Unrated
Denial-of-service in the Exchange email component
A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with enough attributes to keep Thunderbird's main thread CPU-bound for seconds to hours. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.5.
Announced Group revision 1
Original source ↗CVE-2026-110249
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-2026-110249
Thunderbird
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
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Mozilla",
"product": "Thunderbird",
"versions": [
{
"status": "unaffected",
"version": "153.5",
"versionType": "rpm",
"lessThanOrEqual": "153.*"
},
{
"status": "unaffected",
"version": "158",
"versionType": "rpm",
"lessThanOrEqual": "*"
}
]
}
]- Related CVEs
- CVE-2026-110249
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #49304 · Revision 1
- Added to Heist Feed
- Publisher date