Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.
{
"cna_assigner": "HashiCorp",
"cwe_ids": [
"CWE-400"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87106.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "1.21.0"
},
{
"fixed": "2.0.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "1.21.0"
},
{
"fixed": "1.21.18"
}
],
"source": "AFFECTED_FIELD",
"strategy": "ChangesAt"
}
]
}