CVE-2026-31382: The error_description parameter is vulnerable to Reflected XSS

Routine

MEDIUM 6.1MITIGATE

CVE-2026-31382 is a medium-severity flaw (CVSS 6.1) affecting assist. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): Rapid7, Inc. · Vendor: gainsight

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 14:16 UTCPublished CVE record published
2026-06-17 10:33 UTCUpdated Record last modified

gainsight assist MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy assist || rpm -q assist || assist --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31382?

assist: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-31382 being exploited?

CVE-2026-31382 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31382 affect?

CVE-2026-31382 affects assist. Severity is medium (CVSS 6.1). The error_description parameter is vulnerable to Reflected XSS. An attacker can bypass the domain's WAF using a Safari-specific onpagereveal payload.

How urgent is CVE-2026-31382?

Priority 30/100. Public exploit reference

Software pages

Safari vulnerabilities · Apple Safari and WebKit vulnerabilities

Related CVEs

CVE-2026-31381 MEDIUM 5.3 MITIGATE An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the O

References

← Back to latest CVEs