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CVE-2026-3429 is an improper access control vulnerability in the Keycloak Account REST API. The flaw allows a user who is authenticated only at a lower level of assurance to perform a sensitive account-management action that should require stronger re-authentication or proof of possession of an already-registered multi-factor credential. Specifically, an attacker who has obtained a victim’s password can authenticate to the victim account and delete the victim’s registered MFA/OTP credential without first satisfying the higher-assurance check that the deleted factor is intended to enforce. After removing the existing MFA credential, the attacker can enroll a new MFA device under their control, defeating the protection boundary between password-only access and MFA-protected account recovery or credential management.
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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.
3 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.