CVE-2026-27961CWE-1336

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

High · published February 26, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
46.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00562 · 46.0th percentile
Weakness
CWE-1336 · Improper Neutralization of Special Elements Used in a Template Engine
Published
2026-02-26T01:39Z
EPSS history
Timeline
  • 26 FEB 01:39Z
    Agenta's Server-Side Template Injection (SSTI) via custom evaluator Jinja2 templates allows RCE
    cvelistv5