CVE-2026-77177
CRITICAL
CVSS 9.8
Published: 2026-09-29
Modified: 2026-09-30
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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.
Quick Facts
| CVE ID | CVE-2026-77177 |
| CVSS Score | 9.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2026-09-29 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |