CVE-2026-109958 espocrm CVE debrief

Who should care

Defenders responsible for EspoCRM installations, especially those with sensitive email addresses stored in the system, should assess exposure and prioritize remediation. This includes IT administrators, security teams, and operators who manage EspoCRM deployments. They should verify the current EspoCRM version, review access controls, and consider upgrading to version 10.0.7 or later to mitigate the vulnerability.

Why it matters

CVE-2026-109958 is a MEDIUM-severity vulnerability in EspoCRM that allows authenticated users to bypass field-level access control and read restricted email addresses. Defenders should prioritize verifying and remediating this vulnerability, especially in systems where sensitive email addresses are stored and accessed.

• Potential unauthorized access to sensitive email addresses.
• Bypass of field-level access control restrictions.
• Possible data leakage through address-book search API.
• Need for verification of current EspoCRM version and exposure.

Technical summary

The vulnerability is caused by improper access control in the address-book search API of EspoCRM. This allows authenticated users to read restricted emailAddress values even when Roles restrict the emailAddress field. The vulnerability has a CVSS score of 5.3 and is classified as MEDIUM-severity. The affected versions of EspoCRM are 4.0.0 before 10.0.7. The vulnerability can be exploited via the address-book search API, potentially leading to unauthorized access to sensitive email addresses. Users with record access can query address-book search to obtain email addresses even when Roles restrict the emailAddress field.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability, especially in systems where sensitive email addresses are stored and accessed.

Recommended defensive actions

• Verify EspoCRM version and check if it is within the affected range (4.0.0 to 10.0.6).
• Restrict access to the address-book search API for users who should not have access to sensitive email addresses.
• Upgrade to EspoCRM version 10.0.7 or later.
• Monitor for any suspicious activity related to the address-book search API.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, CVSS score, and affected versions. However, additional information on potential exploitation or impact is limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.