Server-Side Request Forgery Vulnerability in OpsTree REMS
CVE-2026-126770

5.3MEDIUM

Key Information:

Vendor

Opstree Solutions

Status
Rems
Vendor
CVE Published:
11 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-126770?

OpsTree REMS versions up to 1.0.0 are affected by a server-side request forgery vulnerability that permits authenticated users to exploit the database Test Connection feature. This flaw allows an attacker to manipulate database entries, potentially connecting the backend to arbitrary destinations, including internal addresses and attacker-controlled servers, facilitating probing of sensitive internal networks reachable from the REMS server.

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-2026-126770 - Proof of Concept

References

https://gist.github.com/neelkotnis/3c4a44d71e8f08747fbac1...
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
.