CVE-2026-31381 — MEDIUM (5.3)

Vulnerability Description

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

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Gainsight	Assist	-

Related Weaknesses (CWE)

CWE-598

References

http://www.rapid7.com/blog/post/ve-cve-2026-31381-cve-2026-31382-gainsight-assisThird Party Advisory
https://communities.gainsight.com/community-news-2/recent-gainsight-assist-plugiVendor Advisory

FAQ

What is CVE-2026-31381?

CVE-2026-31381 is a vulnerability with a CVSS score of 5.3 (MEDIUM). An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the OAuth callback URL.

How severe is CVE-2026-31381?

CVE-2026-31381 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-31381?

Check the references section above for vendor advisories and patch information. Affected products include: Gainsight Assist.