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    CVE-2026-33656

    EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in formula scripting engine allowing updating attachment's sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web server's `open_basedir` scope. Version 9.3.4 fixes the issue.

    Published:Apr 22, 2026
    Last Modified:Apr 27, 2026
    EPS:Apr 22, 2026
    EPSS Score:0.00054
    CVSS Score:9.1

    Affected Products

    Vendor
    Espocrm
    Product
    Espocrm

    Exploits

    https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54xhttps://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54xhttps://github.com/JivaSecurity/ESPOCRM-RCE-POC-CVE-2026-33656

    Related CVEs

    CVE-2026-88896 (CVSS 6.9) — EspoCRM before 10.0.4 is vulnerable to server-side request forgery. HostCheck::ipAddressIsNotInternal(), which…
    CVE-2026-41141 (CVSS 6.5) — EspoCRM is an open source customer relationship management application. Prior to 9.3.5, the POST /api/v1/Email…
    CVE-2026-41160 (CVSS 4.3) — EspoCRM is an open source customer relationship management application. Prior to 9.3.5, a business logic flaw …
    CVE-2026-33741 (CVSS 6.8) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authent…
    CVE-2026-33733 (CVSS 7.2) — EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, the admin temp…
    CVE-2026-33740 (CVSS 5.4) — EspoCRM is an open source customer relationship management application. In versions 9.3.3 and below, the POST …
    CVE-2026-33659 (CVSS 3.5) — EspoCRM is an open source customer relationship management application. In versions 9.3.3 and below, the POST …
    CVE-2026-33657 (CVSS 4.6) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have a stored…
    CVE-2026-33534 (CVSS 4.3) — EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have an authe…
    CVE-2020-37094 (CVSS 8.6) — EspoCRM 5.7.0 prior to 5.9.0 contains an authentication token reuse vulnerability that allows authenticated at…

    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