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CVE-2026-5807 is a denial-of-service vulnerability in HashiCorp Vault caused by unauthenticated access to administrative endpoint families used for root token generation, rekey, and DR secondary operation-token generation. Vault permits only a single in-progress operation for these workflows. An unauthenticated remote attacker with network access to the Vault API can repeatedly initiate or cancel these operations and monopolize the single operation slot, preventing legitimate operators from completing root token generation or rekey ceremonies. The issue is a resource-management and access-control design flaw affecting availability of critical administrative functions. Affected versions include Vault Community Edition up to 1.21.4 and Vault Enterprise up to 1.21.4, 1.20.9, and 1.19.15. The issue is fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0.
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No public exploit code observed for this vulnerability.
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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.
A denial of service vulnerability in HashiCorp Vault involving root-token generation and rekey operations.
A denial-of-service vulnerability in HashiCorp Vault caused by unauthenticated access to administrative endpoints combined with a single in-progress operation slot for root token generation and rekey workflows, allowing an attacker to monopolize or repeatedly cancel/restart these operations and block legitimate administrators.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.