What is CVE-2026-33659?

CVE-2026-33659 is a low-severity vulnerability in Espocrm, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.5/10. Published 2026-04-13.

How severe is CVE-2026-33659?

Low severity. CVSS v3 base score is 3.5 out of 10.

SSRF in Espocrm

CVE-2026-33659

EspoCRM is an open source customer relationship management application. In versions 9.3.3 and below, the POST /api/v1/Attachment/fromImageUrl endpoint is vulnerable to Server-Side Request Forgery (SSRF) via a DNS rebinding (TOCTOU) conditi…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (18.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N.

Affected products

Espocrm — versions < 9.3.4

Weakness classification (CWE)

References

https://github.com/espocrm/espocrm/security/advisories/GHSA-6m4j-fwrx-crh7 (x_refsource_CONFIRM)
https://github.com/espocrm/espocrm/commit/dca03cc3458e487362c26c746378a2d4de9990b1 (x_refsource_MISC)
https://github.com/espocrm/espocrm/releases/tag/9.3.4 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33659?: CVE-2026-33659 is a low-severity vulnerability in Espocrm, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.5/10. Published 2026-04-13.
How severe is CVE-2026-33659?: Low severity. CVSS v3 base score is 3.5 out of 10.