Prompt Injection Vulnerability in OpsTree REMS Product
CVE-2026-126767

5.3MEDIUM

Key Information:

Vendor

Opstree Solutions

Status
Rems
Vendor
CVE Published:
11 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-126767?

The OpsTree REMS product, up to version 1.0.0, is susceptible to a prompt injection vulnerability. This flaw allows authenticated users to exploit the chat functionality by submitting specially crafted inputs to the RCA chat API. As a result, attackers can bypass the intended constraints of the AI assistant, potentially revealing internal system prompts and instructions, which could facilitate further malicious activities. It is essential for users and organizations to address this issue promptly to mitigate the risk of unauthorized data disclosure and increased attack surface.

Affected Version(s)

REMS 0 <= 1.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-126767 - Proof of Concept

References

https://gist.github.com/neelkotnis/548bfde3e45bc3793f3f26...
technical-descriptionexploit
https://opstree.com/rems-ai-powered-observability/
product
https://www.vulncheck.com/advisories/opstree-rems-through...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Neel Saurabh Kotnis
.