CVE-2026-107570 Details
Description
heap OOB write in convert_file_from_to() via a crafted Content-Type header allows attacker to OOB write when email is used as a template.
A heap out-of-bounds write vulnerability has been identified in the Mutt email client, specifically in version 2.4.2. The issue arises in the convert_file_from_to() function within sendlib.c, where a crafted Content-Type header can lead to out-of-bounds writing. This vulnerability is triggered when the recipient uses the received message as a template and resends it, exploiting a logic error that allows the write operation to exceed allocated memory bounds.
The vulnerability has been fixed in Mutt version 2.4.3. Users are advised to update to this version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 8, 2026CISA-ADP
Assessed Oct 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/10/09/21 | CVE | |
| https://gitlab.com/muttmua/mutt/-/work_items/533 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-823 | Use of Out-of-range Pointer Offset | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Mutt | 2.4.2 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 10, 2026 | CVE Modified | CVE |
| Oct 8, 2026 | CVE Modified | CISA-ADP |
| Oct 8, 2026 | New CVE Received | [email protected] |