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CVE-2026-104476— Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive

Quick assessment

Affected
backdrop backdrop
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.

Backdrop CMS 1.35.1 之前的版本存在一个信息泄露漏洞，该漏洞允许未认证的攻击者获取在传输后留在服务器上的配置导出归档文件。攻击者可以下载具有配置导出权限的用户生成的压缩归档文件，从而获取完整的站点配置，包括敏感设置。

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-104476

Vulnerability Information
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Vulnerability Title
Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive
Source: CVE Program / CVE List V5
Vulnerability Description
Backdrop CMS before 1.35.1 contains an information disclosure vulnerability that allows unauthenticated attackers to retrieve configuration export archives left on the server after transfer. Attackers can download compressed archives generated by users with configuration export permission to obtain the full site configuration, including sensitive settings.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
backdrop backdrop 0 ~ 1.35.1 -

II. Public POCs for CVE-2026-104476

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III. Intelligence Information for CVE-2026-104476

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Patches & Fixes for CVE-2026-104476 (1)

Vendor Advisories for CVE-2026-104476 (2)

Vendor Pages for CVE-2026-104476 (1)

IV. Related Vulnerabilities

Same product: backdrop
Same weakness: CWE-200

V. Comments for CVE-2026-104476

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