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CVE-2026-71203— changedetection.io - Missing Authentication on /api/v1/full-spec Discloses Full OpenAPI Schema

Quick assessment

Affected
dgtlmoon changedetection.io
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

dgtlmoon changedetection.io是dgtlmoon个人开发者开源的一款网站变更检测与安全监控平台。 dgtlmoon changedetection.io 0.55.7版本存在授权问题漏洞，该漏洞源于/api/v1/full-spec端点缺少身份验证检查，导致未认证客户端能够检索完整的OpenAPI架构（包括所有端点路径、参数和已注册的处理器插件）。

CVSS 5.3 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1592.004 · Client Configurations

Affected Version Matrix 1

VendorProduct Version RangeStatus
dgtlmoon changedetection.io 0.55.7 affected
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I. Basic Information for CVE-2026-71203

Vulnerability Information
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Vulnerability Title
changedetection.io - Missing Authentication on /api/v1/full-spec Discloses Full OpenAPI Schema
Source: CVE Program / CVE List V5
Vulnerability Description
changedetection.io's REST API resources are protected by an @auth.check_token decorator validating the caller's x-api-key header, except the Spec resource registered at /api/v1/full-spec (changedetectionio/api/Spec.py), whose get method carries neither @auth.check_token nor @validate_openapi_request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
dgtlmoon changedetection.io 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
dgtlmoon changedetection.io是dgtlmoon个人开发者开源的一款网站变更检测与安全监控平台。 dgtlmoon changedetection.io 0.55.7版本存在授权问题漏洞，该漏洞源于/api/v1/full-spec端点缺少身份验证检查，导致未认证客户端能够检索完整的OpenAPI架构（包括所有端点路径、参数和已注册的处理器插件）。
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
dgtlmoon changedetection.io 0.55.7 -

II. Public POCs for CVE-2026-71203

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III. Intelligence Information for CVE-2026-71203

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Other References for CVE-2026-71203 (1)

Same Patch Batch · dgtlmoon · 2026-08-05 · 3 CVEs total

CVE-2026-71205 6.5 MEDIUM changedetection.io - No Rate Limiting on /login Enables Unlimited Password Brute-Force
CVE-2026-71204 6.3 MEDIUM changedetection.io - Omitted Checkbox in /settings Save Silently Disables API Key Enforcem

IV. Related Vulnerabilities

Same product: changedetection.io
Same vendor: dgtlmoon
Same weakness: CWE-306

V. Comments for CVE-2026-71203

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