Bug 2567680 (CVE-2026-86041)

Summary: CVE-2026-86041 github.com/mayswind/ezbookkeeping: ezBookkeeping: IP allowlist bypass via spoofed X-Forwarded-For header
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ezBookkeeping. Due to missing trusted proxy configurations in the web router, the application inherently trusts client-supplied network headers. A remote attacker can exploit this flaw by sending a request with a spoofed X-Forwarded-For HTTP header containing an authorized IP address. This enables the attacker to bypass IP-based access restrictions and cause subsequent actions to be falsely attributed to trusted hosts in audit and transaction logs.
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Description OSIDB Bzimport 2026-11-05 22:17:38 UTC 
ezBookkeeping is an open source, self-hosted personal finance application. From 0.10.0 until 1.6.0, ezBookkeeping constructs its Gin router with gin.New() without configuring SetTrustedProxies, causing c.ClientIP() to trust a spoofed X-Forwarded-For value. An unauthenticated remote attacker can supply an allowlisted address to bypass the mcp_allowed_remote_ips or api_token_allowed_remote_ips gate. A valid MCP or API token remains required for protected actions. When such actions occur, the same spoofed value is stored in Transaction.CreatedIp and the request log, attributing activity to the trusted host instead of the attacker. This issue is fixed in version 1.6.0.