# CVE-2026-31382: Gainsight Assist reflected XSS/HTML injection

> Attackers can execute arbitrary scripts via reflected XSS in the error_description parameter, potentially leading to session hijacking or data theft.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 Mar 2026
- **Updated:** 23 Mar 2026
- **Also known as:** GHSA-gg42-9683-x2xj

## What is CVE-2026-31382?

CVE-2026-31382 is a medium-severity cross-site scripting vulnerability in Gainsight Assist, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

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

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-31382?

It affects 1 product.


Products: Gainsight Assist.

## How do I fix CVE-2026-31382?

No fix has been published for CVE-2026-31382 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-31382 being exploited?

There is no known exploitation of CVE-2026-31382 in the wild and no public exploit code.

## Other vulnerabilities in Gainsight Assist

- [CVE-2026-31381](https://insights.sbomify.com/CVE-2026-31381/): Gainsight Assist plugin information disclosure (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-31382 and fix it if it is affected.

What it is: CVE-2026-31382 is a medium-severity cross-site scripting vulnerability in Gainsight Assist, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-31382 in the wild and no public exploit code.

Affected product: Gainsight Assist. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-31382/ (Markdown: https://insights.sbomify.com/CVE-2026-31382/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-31382
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31382
- OSV: https://osv.dev/vulnerability/CVE-2026-31382

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-31382/
Summaries are generated and may contain mistakes; the official description above is the record.