CVE-2024-28246 KaTeX is missing normalization of the protocol in URLs allows bypassing forbidden protocols
Attackers can bypass URL protocol restrictions in KaTeX by using uppercase protocols, potentially injecting malicious JavaScript links if a custom trust function is used.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-28246?
CVE-2024-28246 is a medium-severity vulnerability in KaTeX, published on 25 Mar 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
KaTeX is a JavaScript library for TeX math rendering on the web. Code that uses KaTeX's `trust` option, specifically that provides a function to blacklist certain URL protocols, can be fooled by URLs in malicious inputs that use uppercase characters in the protocol. In particular, this can allow for malicious input to generate `javascript:` links in the output, even if the `trust` function tries to forbid this protocol via `trust: (context) => context.protocol !== 'javascript'`. Upgrade to KaTeX v0.16.10 to remove this vulnerability.
Which versions are affected by CVE-2024-28246?
2 open source packages ship an affected version, including katex. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
katex npm | From 0.11.0 | 0.16.10 |
katex npm | From 0.11.0 | 0.16.10 |
Products include Katex Katex.
How do I fix CVE-2024-28246?
Upgrade katex to 0.16.10 or later.
Is CVE-2024-28246 being exploited?
There is no known exploitation of CVE-2024-28246 in the wild and no public exploit code.
Other vulnerabilities in KaTeX
Sources
Also known as DEBIAN-CVE-2024-28246, GHSA-3wc5-fcw2-2329, UBUNTU-CVE-2024-28246.