Vulnerability in Gainsight Assist

CVE-2026-31381

An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the OAuth callback URL.

EPSS: 0.003 (22.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Gainsight Assist
Gainsight Assist — versions 0

Weakness classification (CWE)

CWE-598

References

cve@rapid7.com (Third Party Advisory, third-party-advisory)
cve@rapid7.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-31381?: CVE-2026-31381 is a medium-severity vulnerability in Gainsight Assist, classified under CWE-598. CVSS score: 5.3/10. Published 2026-03-20.
How severe is CVE-2026-31381?: Medium severity. CVSS v3 base score is 5.3 out of 10.