CVE-2024-41950Network attack vector

Authenticated code execution via unsandboxed Jinja2 templates

Published Jul 31, 2024 · Updated Jul 31, 2024

Template injection in deepset Haystack before 2.3.1 allows remote authenticated users to execute code through crafted pipeline templates. Prompt builders, OutputAdapter, ConditionalRouter, and PipelineTemplate render attacker-created Jinja2 strings with ordinary Template or NativeEnvironment objects instead of a sandbox. Exploitation requires an application to let a user create and run affected pipeline components, after which code executes in the hosting process.

CVSS severity7.5
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Template injection in deepset Haystack before 2.3.1 allows remote authenticated users to execute code through crafted pipeline templates. Prompt builders, OutputAdapter, ConditionalRouter, and PipelineTemplate render attacker-created Jinja2 strings with ordinary Template or NativeEnvironment objects instead of a sandbox. Exploitation requires an application to let a user create and run affected pipeline components, after which code executes in the hosting process.

The record

CVE
CVE-2024-41950
Published
Jul 31, 2024
Updated
Jul 31, 2024
Vendor
deepset
Product
Haystack
Classifications
CWE-1336, T1059.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2024Record 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 <2.3.1
  2. Affected versionversion=< 2.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

deepset · Haystackversion=0 <2.3.1; version=< 2.3.1

Published CVSS scores

7.5GitHub CNACVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1059.006Command and Scripting Interpreter: Python

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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