CVE-2026-1466 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Jirafeau
Attackers can execute arbitrary JavaScript via MIME type bypass in Jirafeau file previews, requiring a patch to disable MIME sniffing.
- 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
- None listed
What is CVE-2026-1466?
CVE-2026-1466 is a medium-severity cross-site scripting vulnerability in Jirafeau, published on 28 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
Jirafeau normally prevents browser preview for text files due to the possibility that for example SVG and HTML documents could be exploited for cross site scripting. This was done by storing the MIME type of a file and allowing only browser preview for MIME types beginning with image (except for image/svg+xml, see CVE-2022-30110, CVE-2024-12326 and CVE-2025-7066), video and audio. However, it was possible to bypass this check by sending a manipulated HTTP request with an invalid MIME type like image. When doing the preview, the browser tries to automatically detect the MIME type resulting in detecting SVG and possibly executing JavaScript code. To prevent this, MIME sniffing is disabled by sending the HTTP header X-Content-Type-Options: nosniff.
Weakness: CWE-79
Which versions are affected by CVE-2026-1466?
It affects 1 product.
Products include Jirafeau Jirafeau.
How do I fix CVE-2026-1466?
No fix has been published for CVE-2026-1466 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-1466 being exploited?
There is no known exploitation of CVE-2026-1466 in the wild and no public exploit code.
Other vulnerabilities in Jirafeau
- CVE-2018-11349 Cross-site request forgery in n/a
- CVE-2025-7066 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Jirafeau
- CVE-2024-12326 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Jirafeau
- CVE-2022-30110 Cross-site Scripting in Jirafeau
- CVE-2018-11350 Cross-site scripting in n/a
Sources
Also known as GHSA-6x3m-wxmv-rww9.