CVE-2026-34172Public exploitNetwork attack vector

Remote code execution via unsandboxed chat templates

Published Mar 31, 2026 · Updated Mar 31, 2026

Server-side template injection in Giskard AI giskard-oss before 0.3.4 and 1.0.1a1 through 1.0.2a1 allows remote authenticated users to execute code. The ChatWorkflow.chat(message) path converts strings into MessageTemplate.content_template, which MessageTemplate.render() parses with an unsandboxed Jinja2 Environment instead of treating them as plain text. Exploitation requires an application to pass attacker-controlled text directly to chat(); Jinja2 class traversal then exposes system commands, files, and environment variables.

CVSS severity7.7
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Giskard AI giskard-oss before 0.3.4 and 1.0.1a1 through 1.0.2a1 allows remote authenticated users to execute code. The ChatWorkflow.chat(message) path converts strings into MessageTemplate.content_template, which MessageTemplate.render() parses with an unsandboxed Jinja2 Environment instead of treating them as plain text. Exploitation requires an application to pass attacker-controlled text directly to chat(); Jinja2 class traversal then exposes system commands, files, and environment variables.

The record

CVE
CVE-2026-34172
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
Giskard AI
Product
giskard-oss
Classifications
CWE-1336, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.3.4
  2. Affected versionversion=>= 1.0.1a1, < 1.0.2b1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Giskard AI · giskard-ossversion=< 0.3.4; version=>= 1.0.1a1, < 1.0.2b1

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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