CVE-2026-42538 IRIS has an Insecure File Upload
Attackers can upload malicious files to host phishing pages or execute scripts, requiring an upgrade to the patched version.
- 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
- None listed
What is CVE-2026-42538?
CVE-2026-42538 is a medium-severity vulnerability in dfir-iris iris-web, published on 4 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 do not properly validate uploaded files. The application can therefore be misused to host phishing pages, amongst other things. This also creates another instance of a Cross-Site Scripting (XSS) vulnerability. Version 2.4.28 contains a patch.
Weakness: CWE-434
Which versions are affected by CVE-2026-42538?
How do I fix CVE-2026-42538?
No fix has been published for CVE-2026-42538 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-42538 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42538 exists.
Sources
Also known as GHSA-m624-7744-2mhf.