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CVE-2026-111046— FOSSBilling: Low-privileged staff can read and modify configuration of deactivated extensions

Quick assessment

Affected
FOSSBilling FOSSBilling
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.

FOSSBilling 是一个开源的计费与客户管理平台。在 0.8.4 至 0.8.6 版本中， 函数对已禁用的非核心模块存在权限绕过（fails open）漏洞：由于该函数在 条件下提前返回，跳过了对模块访问权限和 权限的检查。因此，一个拥有模块级扩展访问权限的低权限员工账户，可通过 或 接口，针对已禁用的非核心模块发起请求。该账户能够调用 或 ，从而读取已解密并保留的扩展密钥，或覆盖已存储的扩展配置。 函数即使模块处于禁用状态，仍会返回已解密的存储配置。此残留路径是在此前 CVE-2026-62962 授权修复

CVSS 2.3 · Low

Affected Version Matrix 1

VendorProduct Version RangeStatus
FOSSBilling FOSSBilling >= 0.8.4, < 0.8.6 affected
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I. Basic Information for CVE-2026-111046

Vulnerability Information
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Vulnerability Title
FOSSBilling: Low-privileged staff can read and modify configuration of deactivated extensions
Source: CVE Program / CVE List V5
Vulnerability Description
FOSSBilling is an open source billing and client-management platform. From 0.8.4 until 0.8.6, hasManagePermission fails open for inactive non-core modules because its early return on !isExtensionActive skips the module-access and manage_settings checks. A low-privileged staff account with module-level extension access targets a deactivated non-core module through extension/config_get or extension/config_save. The account can call api/admin/extension/config_get or api/admin/extension/config_save for a deactivated non-core module to read decrypted retained extension secrets and overwrite stored extension configuration. The getConfig function returns the decrypted stored configuration despite the module's inactive state. This residual path remained after the earlier CVE-2026-62962 authorization fix. This issue is fixed in version 0.8.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FOSSBilling FOSSBilling >= 0.8.4, < 0.8.6 -

II. Public POCs for CVE-2026-111046

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III. Intelligence Information for CVE-2026-111046

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Patches & Fixes for CVE-2026-111046 (2)

Vendor Advisories for CVE-2026-111046 (1)

Vendor Pages for CVE-2026-111046 (1)

Same Patch Batch · FOSSBilling · 2026-10-19 · 3 CVEs total

CVE-2026-111053 6.9 MEDIUM FOSSBilling: Unauthenticated attacker can probe existence of arbitrary files via guest/sys
CVE-2026-111056 6.9 MEDIUM FOSSBilling: Unauthenticated client account enumeration via guest signup endpoint

IV. Related Vulnerabilities

Same product: FOSSBilling
Same vendor: FOSSBilling
Same weakness: CWE-862

V. Comments for CVE-2026-111046

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