Netflix Lemur up to 1.9.2 sftp-destination plugin password/privateKeyPass information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Netflix Lemur up to 1.9.2. This issue affects some unknown processing of the component sftp-destination plugin. This manipulation of the argument password/privateKeyPass causes information disclosure. This vulnerability is registered as CVE-2026-71307. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Netflix Lemur up to 1.9.2 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component sftp-destination plugin. The manipulation of the argument password/privateKeyPass with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Lemur manages TLS certificate creation. Prior to 1.9.3, GET /api/1/destinations and GET /api/1/destinations/ relied only on authentication while sibling write handlers required admin_permission. DestinationOutputSchema returned raw options and copied them into pluginOptions without redacting sensitive values. The sftp-destination plugin stored password and privateKeyPass values in plaintext, allowing even a read-only user to retrieve credentials for remote certificate-deployment hosts. The exposed credentials could permit direct access to SFTP systems and TLS material outside the Lemur security boundary. The fix requires administrator permission for destination reads and redacts options marked sensitive. This issue is fixed in version 1.9.3.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-71307 since 08/05/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 1.9.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-61153). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Netflix

Name

• Lemur

Version

• 1.9.0
• 1.9.1
• 1.9.2

Website

• Product: https://github.com/Netflix/lemur/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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