What is CVE-2026-33656?

CVE-2026-33656 is a critical-severity vulnerability in Espocrm, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-04-22.

How severe is CVE-2026-33656?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2026-33656 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Espocrm

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 `sour…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (28.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Espocrm — versions < 9.3.4

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

JivaSecurity/ESPOCRM-RCE-POC-CVE-2026-33656

References

https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33656?: CVE-2026-33656 is a critical-severity vulnerability in Espocrm, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-04-22.
How severe is CVE-2026-33656?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2026-33656 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.