Vulnerability · CVE-2026-13411
Null condition in Playbooks import crashes the plugin
Published Oct 22, 2026 · catalog updated Oct 22, 2026 · Mattermost Mattermost
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-13411. EPSS is 0.32%. Act only if a listed version of Mattermost Mattermost is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
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- CVE-2025-55070 · Medium
- Severity
- Medium4.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.32%
- Remediation
- Version ranges on file
- Affected products
- stated named in the record · vendor Mattermost Mattermost
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- stated named in the record<= 11.7.11
- vendor Mattermost Mattermostversion unspecified
How to fix CVE-2026-13411
Upgrade
CVE-2026-13411 lists a fix boundary at 11.7.11. Compare the installed build with that boundary before you change production.
Version check
Affected <= 11.7.11
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-13411. EPSS is 0.32%. Act only if a listed version of Mattermost Mattermost is installed.
Which versions are affected?
Compare what you have installed with named in the record <= 11.7.11. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-754. EPSS 0.32%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 22, 2026 · NIST NVD
Detected
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
Oct 22, 2026 · CVE.org
Updated
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
Oct 22, 2026 · NIST NVD
Updated
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
Sources
- CVE.orgVulnerability recordCVE-2026-13411
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-
cve.org - FIRST EPSSExploitation probabilityCVE-2026-13411
30-day exploitation probability 0.32%
first.org - NIST NVDVulnerability recordCVE-2026-13411
Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 26, 2026
- NIST NVDOct 22, 2026
- CVE.orgOct 22, 2026