What’s Vulnerable › Vulnerabilities

CVE-2026-59155: Nezha Monitoring: DDNS and Notification credential exposure via unredacted list API

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-200

Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Prior to 2.2.5, the GET /api/v1/ddns and GET /api/v1/notification endpoints return full resource objects including plaintext third-party API credentials, including Cloudflare API tokens, TencentCloud SecretKeys, Slack, Discord, and Telegram webhook URLs with embedded bot tokens, and Authorization header values, without any field-level redaction. Any authenticated admin or PAT with nezha:ddns:read or nezha:notification:read scope can receive stored credentials through the listDDNS and listNotification handlers in a single API response. This issue is fixed in version 2.2.5.

Affected products

• nezhahq nezha: before 2.2.5

References

• https://github.com/nezhahq/nezha/commit/39d398066d8c644fe452f74704e34ada6c7ab61e
• https://github.com/nezhahq/nezha/releases/tag/v2.2.5
• https://github.com/nezhahq/nezha/security/advisories/GHSA-ww5p-j6cj-6mqq
• https://github.com/nezhahq/nezha/security/advisories/GHSA-ww5p-j6cj-6mqq

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