CVE-2026-27961 HIGH

CVE-2026-27961: Agenta's Server-Side Template Injection (SSTI) via custom evaluator Jinja2 templates allows RCE

Vendor Agenta-Ai
Product agenta
Weakness CWE-1336
Published February 26, 2026
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Agenta is an open-source LLMOps platform. A Server-Side Template Injection (SSTI) vulnerability exists in versions prior to 0.86.8 in Agenta's API server evaluator template rendering. Although the vulnerable code lives in the SDK package, it is executed server-side within the API process when running evaluators. This does not affect standalone SDK usage — it only impacts self-hosted or managed Agenta platform deployments. Version 0.86.8 contains a fix for the issue.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
February 26, 2026 Record updated