CVE-2026-27961

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

State: Published
Severity: 8.8 High
Published: Feb 26, 2026
Updated: Feb 26, 2026
Reserved: Feb 25, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

Affected Products

Product	Versions
agentaAgenta-AI	< 0.86.8Affected

References

https://github.com/Agenta-AI/agenta/security/advisories/GHSA-cfr2-mp74-3763

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