CVE-2026-12882
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)
Mattermost Markdown autolink parsing denial of service
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and degrade availability for other users via specially crafted post or message attachment content. Mattermost Advisory ID: MMSA-2026-00703
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) |
|---|---|---|---|---|---|
| 11.9.0 | affected | semver | Unavailable | 11.9.0 | None listed |
| 11.8.0 | affected | semver | Unavailable | 11.8.4 | None listed |
| 11.7.0 | affected | semver | Unavailable | 11.7.7 | None listed |
| 10.11.0 | affected | semver | Unavailable | 10.11.22 | None listed |
| 11.10.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.9.1 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.8.5 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.7.8 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.11.23 | unaffected | Unavailable | Unavailable | Unavailable | None listed |