---
id: CVE-2026-77177
title: >-
  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
  evaluati…
summary: >-
  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
  evaluati…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
published: '2026-09-29'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T17:32:07.107'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77177'
references:
  - url: 'https://gist.github.com/abhi04anon/8ce0b68a5a7dda8a0501cbaf933173eb'
    label: cve@mitre.org
  - url: 'https://gist.github.com/abhi04anon/8ce0b68a5a7dda8a0501cbaf933173eb'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00592
epssPercentile: 0.48103
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-29T19:48:42.567852Z'
ingestedAt: '2026-09-29T16:39:33.268Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.