XML Processing error in github.com/crewjam/saml

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

• CISA KEV Not listed.
• EPSS 0.049, the 92nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:44 UTC First seen by agentprime
2. 31 Oct 2026, 14:44 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-4hq8-gmxx-h6w9
• OSV: GHSA-4hq8-gmxx-h6w9
• github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9
• nvd.nist.gov/vuln/detail/CVE-2020-27846
• github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053
• bugzilla.redhat.com/show_bug.cgi?id=1907670
• github.com/crewjam/saml
• grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise
• lists.fedoraproject.org/archives/list/[email protected]/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI
• lists.fedoraproject.org/archives/list/[email protected]/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM
• mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities
• pkg.go.dev/vuln/GO-2021-0058
• security.netapp.com/advisory/ntap-20210205-0002

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.