MEDIUMCVSS v3.1 6.5Vulnerability
CVE-2026-19541
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to require re-entry of the stored client secret when validating an outgoing OAuth connection, which allows an authenticated user with permission to manage outgoing OAuth connections to obtain the secret via pointing the token URL at an attacker-controlled endpoint and triggering validation.. Mattermost Advisory ID: MMSA-2026-00761
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-20T21:14:08.448323+00:00
- Epss score
- 0.00219
- Cvss score
- 6.5
- Cvss severity
- MEDIUM
- Retrieved at
- 2026-10-21T01:24:49+00:00
- Last source
- FIRST EPSS
- Score
- 6.5
- Cvss version
- 3.1
- Cve id
- CVE-2026-19541
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- First seen by Signal
- 2026-10-18T13:39:03+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Published at
- 2026-10-16T07:17:12.520
- Last modified
- 2026-10-16T19:23:18.623
- Epss percentile
- 0.11615
Related Entities (1)
HAS_WEAKNESS (1)
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