CVE-2026-2336 Weak webstax_auth Cookie Authentication Allows Privilege Escalation
Low-privileged users can recover shared cookie secrets to forge administrative cookies, enabling privilege escalation in Microchip IStaX.
- 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-2026-2336?
CVE-2026-2336 is a high-severity vulnerability in Microchip IStaX, published on 16 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstax_auth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03.
Weakness: CWE-331
Which versions are affected by CVE-2026-2336?
It affects 1 product.
Products include Microchip Istax.
How do I fix CVE-2026-2336?
No fix has been published for CVE-2026-2336 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-2336 being exploited?
There is no known exploitation of CVE-2026-2336 in the wild and no public exploit code.
Sources
Also known as GHSA-v47p-q5xc-j34w.