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CVE-2026-4282 is a privilege escalation vulnerability in Keycloak caused by improper isolation in the SingleUseObjectProvider, a global key-value store used for single-use objects. The flaw arises from insufficient type and namespace separation within that store, allowing authorization-code-related data to be forged or confused across contexts. An unauthenticated attacker can exploit this weakness to forge authorization codes and abuse the authorization flow to obtain elevated tokens. In affected deployments, successful exploitation can result in issuance of admin-capable access tokens.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Keycloak privilege escalation vulnerability mentioned only as part of vendor security history.
A privilege escalation vulnerability in Keycloak caused by forged authorization codes due to a SingleUseObjectProvider isolation flaw.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.