CVE-2026-35173 Chyrp Lite has an IDOR via Mass Assignment in Post Model
Authenticated users can modify other users' posts by manipulating internal properties, leading to unauthorized data modification and potential account takeover.
- 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-2026-35173?
CVE-2026-35173 is a medium-severity missing authorization vulnerability in xenocrat chyrp-lite, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Chyrp Lite is an ultra-lightweight blogging engine. Prior to 2026.01, an IDOR / Mass Assignment issue exists in the Post model that allows authenticated users with post editing permissions (Edit Post, Edit Draft, Edit Own Post, Edit Own Draft) to modify posts they do not own and do not have permission to edit. By passing internal class properties such as id into the post_attributes payload, an attacker can alter the object being instantiated. As a result, further actions are performed on another user’s post rather than the attacker’s own post, effectively enabling post takeover. This vulnerability is fixed in 2026.01.
Which versions are affected by CVE-2026-35173?
It affects 1 product.
Products include Chyrplite Chyrp Lite.
How do I fix CVE-2026-35173?
No fix has been published for CVE-2026-35173 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-35173 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35173 exists.
Other vulnerabilities in xenocrat chyrp-lite
Sources
Also known as GHSA-8c3h-rh2j-fxr9.