CVE-2026-87993 PUBLISHED

Consul-template vulnerable to an information disclosure issue in error handling

Assigner: HashiCorp
Reserved: 09.09.2026 Published: 10.09.2026 Updated: 10.09.2026

The consul-template library is vulnerable to an information disclosure issue in its error handling path that may allow Vault secret values to appear in template error messages, log output, and downstream surfaces such as Nomad task events. This vulnerability (CVE-2026-87993) is fixed in consul-template 0.43.0.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 7.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	HashiCorp
Product	Tooling
Versions	Default: unaffected affected from 0.27.2 to 0.43.0 (excl.)

Credits

This issue was reported to HashiCorp by Ali Firas (thesmartshadow).

References

https://discuss.hashicorp.com/t/hcsec-2026-38-consul-template-vulnerable-to-an-information-disclosure-issue-in-error-handling/77740

Problem Types

CWE-532: Insertion of Sensitive Information into Log File CWE

Impacts

CAPEC-215: Fuzzing for application mapping