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VulnerabilityPublished

CVE-2026-77177: Open GenAI Stack · CVE-2026-77177 is a critical

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 16:39 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

Until an official fix is available, avoid using vulnerable versions of Open GenAI Stack in production environments. Implement input sanitization and validation to prevent prompt injection attacks if possible.

Description

CVE-2026-77177 is a critical vulnerability in Open GenAI Stack (ogx-ai) used by Meta AI backend for WhatsApp and other products. It allows unauthenticated remote attackers to execute arbitrary code via prompt injection exploiting unsanitized Jinja2 template syntax for server-side expression evaluation. The vulnerability has a CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability.

References

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