Medium severity · published Sep 10, 2026
CVE-2026-87107
Consul vulnerable to an authorization bypass in the catalog deregistration path
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Consul · HashiCorp
1.21.0 before 2.0.4 · source: vendor
CE
Consul Enterprise · HashiCorp
1.21.0 before 2.0.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87107
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87107
discuss.hashicorp.com
https://discuss.hashicorp.com/t/hcsec-2026-36-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-deregistration-path/77738
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