CVE-2026-2476
CVE-2026-2476 is a high-severity vulnerability in Mattermost Ms Teams with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.
Key facts
- Severity: High (CVSS 3.x base score 7.6)
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12387
- Weakness: CWE-200
- Affected product: Mattermost Ms Teams
- Published:
- Last modified:
Description
Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606
Frequently asked questions
- What is CVE-2026-2476?
- Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606
- How severe is CVE-2026-2476?
- CVE-2026-2476 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2026-2476 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-2476?
- CVE-2026-2476 affects Mattermost Ms Teams. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-2476?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-2476 have an EU (EUVD) identifier?
- Yes. CVE-2026-2476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12387.
- When was CVE-2026-2476 published?
- CVE-2026-2476 was published on 2026-03-16 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:mattermost:*:*
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