# CVE-2026-21730: Stored XSS in Verba

> An attacker can inject malicious scripts via the login username field, which execute in the administrator's browser when viewing logs.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **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:** 14 May 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-pqwf-7gjw-fvph

## What is CVE-2026-21730?

CVE-2026-21730 is a medium-severity cross-site scripting vulnerability in Verint Verba, published on 14 May 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

Verba is affected by a Stored Cross-Site Scripting (XSS) vulnerability within its login logging mechanism. When an unauthenticated remote attacker attempts to log in using an incorrect username and password combination, the supplied username value is recorded in the application logs. Due to lack of input sanitization, an attacker can inject a malicious XSS payload into the username field.
This payload will be executed in the context of the administrator’s browser when the admin accesses the web application's log viewer.

The vendor was notified early about this vulnerability, but didn't respond to our messages. This issue was fixed in version 10.0.6

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

## Which versions are affected by CVE-2026-21730?

It affects 1 product.


Products: Verint Verba Collaboration Compliance and Quality Management Platform.

## How do I fix CVE-2026-21730?

No fix has been published for CVE-2026-21730 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21730 being exploited?

There is no known exploitation of CVE-2026-21730 in the wild and no public exploit code.

## Other vulnerabilities in Verint Verba

- [CVE-2018-17871](https://insights.sbomify.com/CVE-2018-17871/): Missing authorization in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21730 and fix it if it is affected.

What it is: CVE-2026-21730 is a medium-severity cross-site scripting vulnerability in Verint Verba, published on 14 May 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-2026-21730 in the wild and no public exploit code.

Affected product: Verint Verba. 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-2026-21730/ (Markdown: https://insights.sbomify.com/CVE-2026-21730/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21730
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21730
- OSV: https://osv.dev/vulnerability/CVE-2026-21730

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21730/
Summaries are generated and may contain mistakes; the official description above is the record.