Loading vulnerability…
CVE-2026-3872 is an information disclosure vulnerability in Keycloak caused by improper validation of redirect URIs in the OpenID Connect authorization flow. When a client configuration uses wildcard-based allowed redirect URIs, an attacker who controls another path on the same web server can bypass the intended path restriction by using path traversal semantics involving a crafted redirect URI. This allows the authorization endpoint to accept a redirect target outside the intended allowed path while still appearing to match the wildcard rule. The flaw affects redirect URI validation logic rather than token generation itself, and can result in authorization responses being sent to an attacker-controlled endpoint on the same host.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.