CVE-2026-86041

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    CVE-2026-86041

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: ezBookkeeping: Source-IP allowlist (MCP & API token) is bypassable via a spoofed `X-Forwarded-For` header

    Details: 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.

    References: https://github.com/mayswind/ezbookkeeping/releases/tag/v1.6.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86041.json, https://github.com/mayswind/ezbookkeeping/security/advisories/GHSA-wchh-mrv2-5h4q, https://nvd.nist.gov/vuln/detail/CVE-2026-86041, https://github.com/mayswind/ezbookkeeping/commit/d79a5beb8037e529dc4dc64a6d22bd2d02b2e986

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 06ef2220d63d257e057d5076e4422ebbe6fb0755
    Fixed -e5c12d378531337ea5cf410ca865a9a558398b9c

    Affected versions

    v1.5.1
    v1.5.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-86041 | CVE-DB