Security Bulletin: Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Summary Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

BIT-VAULT-2026-5807 Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

CVE-2026-5807

A flaw was found in Vault. An unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations. This action occupies the single slot designated for in-progress operations, effectively preventing legitimate operators from completing critical administrative...

EUVD-2026-23362

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

GHSA-88V5-9HXC-F85R HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

CVE-2026-5807

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

CVE-2026-5807

Vault is vulnerable to a denial-of-service condition: an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot and preventing legitimate operators from completing these workflows. The issue is fixed in...

CVE-2026-5807

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

CVE-2026-5807 Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

CVE-2026-5807 Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This...

EulerOS 2.0 SP12 : libssh (EulerOS-SA-2026-1073)

According to the versions of the libssh package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in libssh's handling of key exchange KEX processes when a client repeatedly sends incorrect KEX guesses. The library fails to free...

EUVD-2025-27246

Malicious code in bioql PyPI...

DEBIAN-CVE-2025-8277

A flaw was found in libssh's handling of key exchange KEX processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when...

AZL-67095 CVE-2025-8277 affecting package libssh for versions less than 0.10.6-4

A flaw was found in libssh's handling of key exchange KEX processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when...

CVE-2025-8277 Libssh: memory exhaustion via repeated key exchange in libssh

A flaw was found in libssh's handling of key exchange KEX processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when...

GO-2025-3788 Vault Community Edition rekey and recovery key operations can cause denial of service in github.com/hashicorp/vault

Vault Community Edition rekey and recovery key operations can cause denial of service in github.com/hashicorp/vault...

GO-2025-3783 OpenBao allows cancellation of root rekey and recovery rekey operations without authentication in github.com/openbao/openbao

OpenBao allows cancellation of root rekey and recovery rekey operations without authentication in github.com/openbao/openbao...

GHSA-FHC2-8QX8-6VJ7 Vault Community Edition rekey and recovery key operations can cause denial of service

Vault Community and Vault Enterprise rekey and recovery key operations can lead to a denial of service due to uncontrolled cancellation by a Vault operator. This vulnerability CVE-2025-4656 has been remediated in Vault Community Edition 1.20.0 and Vault Enterprise 1.20.0, 1.19.6, 1.18.11, 1.17.17...

Vault Community Edition rekey and recovery key operations can cause denial of service

Vault Community and Vault Enterprise rekey and recovery key operations can lead to a denial of service due to uncontrolled cancellation by a Vault operator. This vulnerability CVE-2025-4656 has been remediated in Vault Community Edition 1.20.0 and Vault Enterprise 1.20.0, 1.19.6, 1.18.11, 1.17.17...

GHSA-PRPJ-RCHP-9J5H OpenBao allows cancellation of root rekey and recovery rekey operations without authentication

Impact OpenBao and HashiCorp Vault allowed an attacker to perform unauthenticated, unaudited cancellation of root rekey and recovery rekey operations, effecting a denial of service. Patches In OpenBao v2.2.2 and later, manually setting the configuration option disableunauthedrekeyendpoints=true...