CVE-2026-77177CWE-94code-injection

CVE-2026-77177

Critical · published September 29, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
47.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00592 · 47.6th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-09-29T20:17Z
References (2)
https://gist.github.com/abhi04anon/8ce0b68a5a7dda8a0501cbaf933173eb · [email protected]https://gist.github.com/abhi04anon/8ce0b68a5a7dda8a0501cbaf933173eb · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 01 OCT 03:49Z
    EPSS moved — → 1%
    epss
  • 29 SEP 00:00Z
    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…
    cvelistv5