# CVE-2026-29965: Cross-site scripting in n/a

> An attacker can execute arbitrary scripts in the victim's browser via the WarningUrlPage endpoint, 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:L/I:L/A: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:** 18 May 2026
- **Updated:** 18 May 2026
- **Also known as:** GHSA-qrv4-g78c-hphg

## What is CVE-2026-29965?

CVE-2026-29965 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 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

HSC MailInspector 5.3.3-7 is vulnerable to Cross Site Scripting (XSS) in the /police/WarningUrlPage.php endpoint due to improper neutralization of user-supplied input that uses alternate or obfuscated JavaScript syntax.

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

## Which versions are affected by CVE-2026-29965?

It affects 1 product.


Products: Hsclabs Mailinspector.

## How do I fix CVE-2026-29965?

No fix has been published for CVE-2026-29965 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-29965 being exploited?

There is no known exploitation of CVE-2026-29965 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-32370](https://insights.sbomify.com/CVE-2024-32370/): Information disclosure in n/a (critical 9.8)
- [CVE-2024-34470](https://insights.sbomify.com/CVE-2024-34470/): Path traversal in n/a (high 8.6)
- [CVE-2026-29962](https://insights.sbomify.com/CVE-2026-29962/): Path traversal in n/a (high 7.5)
- [CVE-2026-29963](https://insights.sbomify.com/CVE-2026-29963/): Path traversal in n/a (high 7.5)
- [CVE-2024-32371](https://insights.sbomify.com/CVE-2024-32371/): Privilege escalation in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-29965 and fix it if it is affected.

What it is: CVE-2026-29965 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 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-2026-29965 in the wild and no public exploit code.

Affected product: n/a. 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-2026-29965/ (Markdown: https://insights.sbomify.com/CVE-2026-29965/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-29965
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-29965
- OSV: https://osv.dev/vulnerability/CVE-2026-29965

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-29965/
Summaries are generated and may contain mistakes; the official description above is the record.