HashiCorp Consul Template up to 0.42.x Error information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in HashiCorp Consul Template up to 0.42.x. Affected by this vulnerability is an unknown functionality of the component Error Handler. The manipulation results in information disclosure. This vulnerability is cataloged as CVE-2026-87993. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in HashiCorp Consul Template up to 0.42.x. Affected is an unknown code block of the component Error Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at discuss.hashicorp.com. This vulnerability is traded as CVE-2026-87993 since 09/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 0.43.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• HashiCorp

Name

• Consul Template

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42

License

• open-source

CPE 2.3info

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CPE 2.2info

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• 🔒

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Once again VulDB remains the best source for vulnerability data.

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