Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M

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

High 8.8

In plain English

A high-severity security flaw in agenta from Agenta-AI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 69.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	agenta	0.86.8	PYSEC-2026-7

Affected products (as reported)

Vendor	Product	Versions
Agenta-AI	agenta	< 0.86.8

Weakness: CWE-1336 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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