Missing Authorization in Rill OAuth Server for Rill Data
CVE-2026-108718

8.6HIGH

Key Information:

Vendor

Rill Data

Status
Rill
Vendor
CVE Published:
11 October 2026

What is CVE-2026-108718?

Versions of Rill from 0.77.0 to 0.90.5 are susceptible to a missing authorization vulnerability in the admin OAuth server. This issue allows attackers to register unauthorized clients that can issue authorization codes without user consent. By exploiting this vulnerability, malicious actors can obtain a long-lived API token with full user permissions by luring users to an unauthorized authorization link, leading to a risk of unauthorized access and potential data breaches.

Affected Version(s)

rill 0.77.0 <= 0.90.5

References

https://hackmd.io/@haind03/rill-oauth-open-registration-l...
third-party-advisory
https://github.com/rilldata/rill/blob/b9ea8c6f215e56c4c08...
technical-description
https://github.com/rilldata/rill/blob/b9ea8c6f215e56c4c08...
technical-description

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.