Vulnerability Report: GO-2026-6281

Affected Modules

• Path
  Go Versions
• github.com/mattermost/mattermost-server
  from v10.11.0+incompatible before v10.11.17+incompatible, from v11.5.0+incompatible before v11.5.5+incompatible, from v11.6.0+incompatible before v11.6.1+incompatible
• github.com/mattermost/mattermost-server/v5
  all versions, no known fixed
• github.com/mattermost/mattermost-server/v6
  all versions, no known fixed
• github.com/mattermost/mattermost/server/v8
  from v8.0.0-20250731163400-5b955468ea1e before v8.0.0-20260423180926-c021eeaff8f0

Aliases

• CVE-2026-6961
• GHSA-8qq9-cqj8-82w4

References

• https://github.com/advisories/GHSA-8qq9-cqj8-82w4
• https://nvd.nist.gov/vuln/detail/CVE-2026-6961
• https://github.com/mattermost/mattermost/commit/61d68d2d6ee81a5919597d91c736c502d7156859
• https://github.com/mattermost/mattermost/commit/a0056ed68d95f64d7c4586985e7b7f16b96b3bec
• https://github.com/mattermost/mattermost/commit/a9f3868e1eee9ec61855cd7277f39937385efffd
• https://github.com/mattermost/mattermost/commit/c021eeaff8f003034ab40f82c552cc26a710a8fd
• https://github.com/mattermost/mattermost/commit/c896a63dc44c2f9c081a0a15bfddc4e6eb50e753
• https://github.com/mattermost/mattermost/pull/36223
• https://github.com/mattermost/mattermost/pull/36251
• https://github.com/mattermost/mattermost/pull/36252
• https://github.com/mattermost/mattermost/pull/36253
• https://github.com/mattermost/mattermost/pull/36255
• https://github.com/mattermost/mattermost/releases/tag/v10.11.16
• https://github.com/mattermost/mattermost/releases/tag/v11.5.5
• https://github.com/mattermost/mattermost/releases/tag/v11.6.2
• https://github.com/mattermost/mattermost/releases/tag/v11.7.0
• https://mattermost.com/security-updates
• https://vuln.go.dev/ID/GO-2026-6281.json

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