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Vulnerabilities

Vulnerability · CVE-2026-33656

EspoCRM is an open source customer relationship management application.

Published Apr 22, 2026 · catalog updated Jun 17, 2026 · EspoCRM is an open

Check if you run it

No confirmed exploitation is on record for CVE-2026-33656. EPSS is 0.60%. Act only if a listed version of EspoCRM is an open is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (EspoCRM is an open).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.60%
Remediation
Advisory link
Affected products
cpe espocrm/espocrm

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 field on entities. Because is concatenated directly into a file path with no sanitization in , an attacker can redirect any file read or write operation to an arbitrary path within the web server's scope. Version 9.3.4 fixes the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe espocrm/espocrmversion unspecified

How to fix CVE-2026-33656

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33656. EPSS is 0.60%. Act only if a listed version of EspoCRM is an open is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal. EPSS 0.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 22, 2026 · NIST NVD

    Detected

    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 field on entities. Because is concatenated directly into a file path with no sanitization in , an attacker can redirect any file read or write operation to an arbitra

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 field on entities. Because is concatenated directly into a file path with no sanitization in , an attacker can redirect any file read or write operation to an arbitra

Sources

  • CVE.orgVulnerability recordCVE-2026-33656

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33656

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-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 field on entities. Bec

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.