CVE-2025-35965

Description

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to validate the uniqueness and quantity of task actions within the UpdateRunTaskActions GraphQL operation, which allows an attacker to create task items containing an excessive number of actions triggered by specific posts, overloading the server and leading to a denial-of-service (DoS) condition.

Reserved 2025-04-22 | Published 2025-04-24 | Updated 2025-04-24 | Assigner Mattermost

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

10.4.0
affected

10.5.0
affected

9.11.0
affected

10.6.0
unaffected

10.4.3
unaffected

10.5.1
unaffected

9.11.11
unaffected

Credits

vultza (vultza) finder

References

mattermost.com/security-updates

cve.org (CVE-2025-35965)

nvd.nist.gov (CVE-2025-35965)

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