CVE-2026-43891— changedetection.io: Arbitrary Local File Read via crafted backup restore
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I. Basic Information for CVE-2026-43891
Vulnerability Information
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Vulnerability Title
changedetection.io: Arbitrary Local File Read via crafted backup restore
Source: NVD (National Vulnerability Database)
Vulnerability Description
changedetection.io is a free open source web page change detection tool. Prior to 0.55.1, the vulnerability is caused by trusting attacker-controlled snapshot paths restored from backup files. The vulnerable flow starts in the backup restore logic. When a backup ZIP is restored, the application extracts the archive and copies each restored watch UUID directory directly into the live datastore using shutil.copytree(entry.path, dst_dir). This preserves attacker-controlled files inside the restored watch directory, including history.txt. After restore, the application parses history.txt in the watch history property and returns the contents of the targeted local file. This vulnerability is fixed in 0.55.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
文件名或路径的外部可控制
Source: NVD (National Vulnerability Database)
Vulnerability Title
changedetection.io 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
changedetection.io是dgtlmoon个人开发者的一个网站变更检测、监控和通知应用程序。 changedetection.io 0.55.1之前版本存在安全漏洞，该漏洞源于信任攻击者控制的从备份文件恢复的快照路径，可能导致读取目标本地文件内容。
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 | < 0.55.1 | - |
II. Public POCs for CVE-2026-43891
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: changedetection.io
- CVE-2026-41895
changedetection.io: XXE vulnerability in the changedetection - CVE-2026-35490
changedetection.io has an Authentication Bypass via Decorato - CVE-2026-35000
ChangeDetection.io < 0.54.7 SafeXPath3Parser Bypass Arbitrar - CVE-2026-33981
Changedetection.io Discloses Environment Variables via jq en - CVE-2026-29065
changedetection.io: Zip Slip vulnerability in the backup res
Same vendor: dgtlmoon
- CVE-2026-41895
changedetection.io: XXE vulnerability in the changedetection - CVE-2026-35490
changedetection.io has an Authentication Bypass via Decorato - CVE-2026-35000
ChangeDetection.io < 0.54.7 SafeXPath3Parser Bypass Arbitrar - CVE-2026-33981
Changedetection.io Discloses Environment Variables via jq en - CVE-2026-29065
changedetection.io: Zip Slip vulnerability in the backup res
Same weakness: CWE-73
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Motors – Car Dealer, Classifieds & Listing <= 1.4.107 - Auth - CVE-2026-0259
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V. Comments for CVE-2026-43891
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