Medium severity4.3NVD Advisory· Published Aug 26, 2022· Updated Jun 17, 2026
CVE-2021-3856
CVE-2021-3856
Description
ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-coreMaven | < 15.1.0 | 15.1.0 |
Affected products
3Patches
Vulnerability mechanics
References
7- github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743nvdPatchThird Party AdvisoryWEB
- github.com/keycloak/keycloak/pull/8588nvdPatchThird Party AdvisoryWEB
- access.redhat.com/security/cve/CVE-2021-3856nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-3w4v-rvc4-2xpwghsaADVISORY
- issues.redhat.com/browse/KEYCLOAK-19422nvdPermissions RequiredVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-3856ghsaADVISORY
News mentions
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