Medium severity · published Sep 14, 2026
CVE-2026-90934
EspoCRM before 10.0.4 Field-level Security Bypass via Attendees
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
EspoCRM before 10.0.4 contains a field-level security bypass vulnerability in the meeting and call attendees endpoints that allows authenticated users to read restricted email addresses. Attackers can recover hidden attendee emails by exploiting incorrect ACL scope validation that checks parent event permissions instead of attendee entity permissions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
espocrm · espocrm
before 10.0.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90934
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90934
github.com
https://github.com/espocrm/espocrm/security/advisories/GHSA-hpgx-8qg3-5w7v
www.vulncheck.com
https://www.vulncheck.com/advisories/espocrm-before-10.0.4-field-level-security-bypass-via-attendees
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