CVE-2026-4635
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)
Persistent notification timing attack causing server denial of service
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637
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) |
|---|---|---|---|---|---|
| 11.6.0 | affected | semver | Unavailable | 11.6.0 | None listed |
| 11.5.0 | affected | semver | Unavailable | 11.5.3 | None listed |
| 11.4.0 | affected | semver | Unavailable | 11.4.4 | None listed |
| 10.11.0 | affected | semver | Unavailable | 10.11.14 | None listed |
| 11.7.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.6.1 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.5.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.4.5 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.11.15 | unaffected | Unavailable | Unavailable | Unavailable | None listed |