GO-2026-6483

vendorUSosv

Mattermost doesn't authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret in github.com/mattermost/mattermost-server

view advisory published 2026-09-28Licence: per source

Mattermost doesn't authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret in github.com/mattermost/mattermost-server

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-6673US	—OT elevated	0.30% (23rd)	—	2026-06-22
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthen…

references

External citations — patches, advisories, analysis.

https://github.com/advisories/GHSA-jqgv-39mg-7c2rADVISORY
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2026-6673ADVISORY

scry

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