CVE-2026-1879 Harvard University IQSS Dataverse Theme Customization ThemeAndWidgets.xhtml unrestricted upload
Remote attackers can upload malicious files via the theme customization feature, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1879?
CVE-2026-1879 is a medium-severity vulnerability in Harvard University IQSS Dataverse, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in Harvard University IQSS Dataverse up to 6.8. This affects an unknown function of the file /ThemeAndWidgets.xhtml of the component Theme Customization. Performing a manipulation of the argument uploadLogo results in unrestricted upload. Remote exploitation of the attack is possible. The exploit is now public and may be used. Upgrading to version 6.10 mitigates this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Which versions are affected by CVE-2026-1879?
How do I fix CVE-2026-1879?
No fix has been published for CVE-2026-1879 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1879 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1879 exists.
Sources
Also known as GHSA-xfqh-9ppr-q5mc.