CVE-2026-96259
- Source
- https://cve.org/CVERecord?id=CVE-2026-96259
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96259.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-96259
- Published
- 2026-09-22T20:34:20Z
- Modified
- 2026-10-09T02:47:42Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- Mattermost server-side request forgery via OAuth endpoints configurable by a System Administrator
- Details
-
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 apply the internal-connection filter to OAuth endpoint requests, which allows a System Administrator to make the server issue requests to internal network addresses and read the responses via the configured OAuth token and userinfo endpoints.. Mattermost Advisory ID: MMSA-2026-00776
- Database specific
{ "cna_assigner": "Mattermost", "cwe_ids": [ "CWE-918" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96259.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "11.9.0" }, { "last_affected": "11.9.1" }, { "introduced": "11.8.0" }, { "last_affected": "11.8.5" }, { "introduced": "11.7.0" }, { "last_affected": "11.7.10" }, { "introduced": "11.10.0" }, { "last_affected": "11.10.1" } ], "source": "AFFECTED_FIELD" } ] }- References
Affected packages
Git / github.com/mattermost/mattermost
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost
- Events
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "11.7.0" }, { "fixed": "11.7.11" }, { "introduced": "11.9.0" }, { "fixed": "11.9.2" }, { "introduced": "11.10.0" }, { "fixed": "11.10.2" } ], "source": "CPE_RANGE" }
Affected versions
@mattermost/client@11.*
@mattermost/client@11.7.0
@mattermost/client@11.9.0
@mattermost/shared@11.*
@mattermost/shared@11.7.0
@mattermost/shared@11.9.0
@mattermost/types@11.*
@mattermost/types@11.7.0
@mattermost/types@11.9.0
mattermost-redux@11.*
mattermost-redux@11.7.0
mattermost-redux@11.9.0
v11.*
v11.10.0
v11.10.0-rc3
v11.10.1
v11.7.0
v11.7.1
v11.7.10
v11.7.2
v11.7.3
v11.7.4
v11.7.5
v11.7.5-rc1
v11.7.6
v11.7.7
v11.7.8
v11.7.9
v11.9.0
v11.9.1
v11.9.1-rc1