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CVE-2026-71307— Lemur: Authenticated low-privilege users can read plaintext destination credentials (SFTP password / private-key passphrase) via the destinations API

Quick assessment

Affected
Netflix lemur
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netflix lemur是美国Netflix公司开源的一个证书管理工具。 Netflix lemur 1.9.3之前版本存在授权问题漏洞，该漏洞源于GET /api/1/destinations接口仅依赖身份验证而缺少管理员权限验证，且sftp-destination插件以明文存储密码和私钥密码，可能导致只读用户获取远程证书部署主机的凭据，进而直接访问SFTP系统和TLS材料。

CVSS 7.7 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
Netflix lemur < 1.9.3 affected
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I. Basic Information for CVE-2026-71307

Vulnerability Information
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Vulnerability Title
Lemur: Authenticated low-privilege users can read plaintext destination credentials (SFTP password / private-key passphrase) via the destinations API
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Netflix lemur 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netflix lemur是美国Netflix公司开源的一个证书管理工具。 Netflix lemur 1.9.3之前版本存在授权问题漏洞，该漏洞源于GET /api/1/destinations接口仅依赖身份验证而缺少管理员权限验证，且sftp-destination插件以明文存储密码和私钥密码，可能导致只读用户获取远程证书部署主机的凭据，进而直接访问SFTP系统和TLS材料。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Netflix lemur < 1.9.3 -

II. Public POCs for CVE-2026-71307

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8019 chars
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III. Intelligence Information for CVE-2026-71307

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Patches & Fixes for CVE-2026-71307 (1)

Vendor Advisories for CVE-2026-71307 (1)

Vendor Pages for CVE-2026-71307 (1)

Same Patch Batch · Netflix · 2026-08-18 · 14 CVEs total

CVE-2026-55166 9.9 CRITICAL Lemur: any SSO-authenticated user achieves AWS IAM compromise and permanent PKI key access
CVE-2026-48508 8.8 HIGH Lemur: Authorization bypass in StrictRolePermission / AuthorityCreatorPermission
CVE-2026-71308 8.1 HIGH Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation
CVE-2026-71303 7.7 HIGH Lemur: Incomplete fix for CVE-2026-55166 -- ACME authority update endpoint allows non-admi
CVE-2026-70666 7.4 HIGH Lemur: Server-Side Request Forgery via the ACME client following server-controlled URLs
CVE-2026-71417 7.3 HIGH Lemur: Any user can revoke arbitrary certificates at the CA by uploading a duplicate recor
CVE-2026-71317 6.5 MEDIUM Lemur: Sub-CA creation never checks `AuthorityPermission` on the parent authority
CVE-2026-70667 6.3 MEDIUM Lemur: SSRF protection in certificate revocation checking bypassable via HTTP redirects an
CVE-2026-55162 6.3 MEDIUM Lemur: Post-authentication SSRF via certificate verification - attacker-controlled CRL and
CVE-2026-55163 6.3 MEDIUM Lemur: Privilege escalation via PUT /api/1/roles/<id> — non-admin role members can rewrite
CVE-2026-55164 4.9 MEDIUM Lemur: Plaintext password storage in Lemur user-update path
CVE-2026-55165 4.8 MEDIUM Lemur : JWT verifier trusts attacker-supplied alg from token header — defense-in-depth gap
CVE-2026-71322 4.3 MEDIUM Lemur: Missing authorization check on POST /certificates/<id>/export for plugins with requ

IV. Related Vulnerabilities

Same product: lemur
Same vendor: Netflix
Same weakness: CWE-862

V. Comments for CVE-2026-71307

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