CVE-2026-6340
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Memory Exhaustion via Malicious 7zip File Upload
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Mattermost
- Vendor
- Mattermost
- Product
- Mattermost
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 11.5.0 | affected | semver | Unavailable | 11.5.1 | None listed |
| 10.11.0 | affected | semver | Unavailable | 10.11.13 | None listed |
| 11.4.0 | affected | semver | Unavailable | 11.4.3 | None listed |
| 11.6.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.5.2 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.11.14 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.4.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |