# CVE-2026-24127: Typemill has Reflected XSS via login error view template

> An attacker can execute arbitrary scripts in the login page context via reflected XSS in the Typemill CMS login error template.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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:** 23 Jan 2026
- **Updated:** 26 Jan 2026
- **Also known as:** GHSA-65x4-pjhj-r8wr

## What is CVE-2026-24127?

CVE-2026-24127 is a medium-severity cross-site scripting vulnerability in typemill, published on 23 Jan 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

Typemill is a flat-file, Markdown-based CMS designed for informational documentation websites. A reflected Cross-Site Scripting (XSS) exists in the login error view template `login.twig` of versions 2.19.1 and below. The `username` value can be echoed back without proper contextual encoding when authentication fails. An attacker can execute script in the login page context. This issue has been fixed in version 2.19.2.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-116 (Improper Encoding or Escaping of Output)

## Which versions are affected by CVE-2026-24127?

It affects 1 product.


Products: Typemill Typemill.

## How do I fix CVE-2026-24127?

No fix has been published for CVE-2026-24127 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-24127 being exploited?

There is no known exploitation of CVE-2026-24127 in the wild and no public exploit code.

## Other vulnerabilities in typemill

- [CVE-2022-28053](https://insights.sbomify.com/CVE-2022-28053/): File upload in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24127 and fix it if it is affected.

What it is: CVE-2026-24127 is a medium-severity cross-site scripting vulnerability in typemill, published on 23 Jan 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-2026-24127 in the wild and no public exploit code.

Affected product: typemill. 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-2026-24127/ (Markdown: https://insights.sbomify.com/CVE-2026-24127/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24127
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24127
- OSV: https://osv.dev/vulnerability/CVE-2026-24127

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24127/
Summaries are generated and may contain mistakes; the official description above is the record.