Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.8 | Critical | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA (Mattermost) |
- CISA KEV Not listed.
- EPSS 0.021, the 81st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:44 UTC First seen by agentprime
- 31 Oct 2026, 14:44 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-xhqq-x44f-9fgg
- OSV: GHSA-xhqq-x44f-9fgg
- github.com/russellhaering/gosaml2/security/advisories/GHSA-xhqq-x44f-9fgg
- nvd.nist.gov/vuln/detail/CVE-2020-29509
- github.com/russellhaering/gosaml2/commit/42606dafba60c58c458f14f75c4c230459672ab9
- github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md
- pkg.go.dev/vuln/GO-2021-0060
- security.netapp.com/advisory/ntap-20210129-0006