CVE-2026-77177 Code injection in n/a
Attackers can execute arbitrary code on the server via prompt injection using Jinja2 template syntax in the Open GenAI Stack backend.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77177?
CVE-2026-77177 is a critical code injection vulnerability in n/a, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Open GenAI Stack (aka ogx-ai) 2026-06-11, as used in the Meta AI backend for WhatsApp and other products, allows code execution because prompt injection (with Jinja2 template syntax) can be used to achieve server-side expression evaluation without sanitization.
Weakness: CWE-94
Which versions are affected by CVE-2026-77177?
How do I fix CVE-2026-77177?
No fix has been published for CVE-2026-77177 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-77177 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77177 exists.
Sources
Also known as GHSA-9rwh-q28c-cv6g.