CVE-2024-41950
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Haystack is an end-to-end LLM framework that allows you to build applications powered by LLMs, Transformer models, vector search and more. Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions. Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code. The vulnerability has been fixed with Haystack 2.3.1.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Haystack is an end-to-end LLM framework that allows you to build applications powered by LLMs, Transformer models, vector search and more. Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions. Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code. The vulnerability has been fixed with Haystack 2.3.1.
- Record
CVE-2024-41950- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
EUVDEUVD-2024-2367
Haystack is an end-to-end LLM framework that allows you to build applications powered by LLMs, Transformer models, vector search and more. Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions. Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code. The vulnerability has been fixed with Haystack 2.3.1.
- Record
EUVD-2024-2367- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hx9v-6r9f-w677
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Impact
Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions.
Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code.
Patches
The problem has been fixed with PRs deepset-ai/haystack#8095 and deepset-ai/haystack#8096.
Both have been released with Haystack 2.3.1.
Workarounds
Prevent users from running the affected Components, or only let users use preselected templates.
References
The list of impacted Components can be found in the release notes for 2.3.1.
https://github.com/deepset-ai/haystack/releases/tag/v2.3.1
- Record
GHSA-hx9v-6r9f-w677- CVSS 4.0
- 7.7 High
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 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
NVD
Haystack is an end-to-end LLM framework that allows you to build applications powered by LLMs, Transformer models, vector search and more. Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions. Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code. The vulnerability has been fixed with Haystack 2.3.1.
- Record
CVE-2024-41950- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
OSV
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Haystack is an end-to-end LLM framework that allows you to build applications powered by LLMs, Transformer models, vector search and more. Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions. Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code. The vulnerability has been fixed with Haystack 2.3.1.
- Record
CVE-2024-41950- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
OSVGHSA-hx9v-6r9f-w677
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Impact
Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions.
Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code.
Patches
The problem has been fixed with PRs deepset-ai/haystack#8095 and deepset-ai/haystack#8096.
Both have been released with Haystack 2.3.1.
Workarounds
Prevent users from running the affected Components, or only let users use preselected templates.
References
The list of impacted Components can be found in the release notes for 2.3.1.
https://github.com/deepset-ai/haystack/releases/tag/v2.3.1
- Record
GHSA-hx9v-6r9f-w677- CVSS 4.0
- 7.7 High
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 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1336
- Updated
- 2026-11-02
OSVPYSEC-2026-1447
Insecure Jinja2 templates rendered in Haystack Components can lead to RCE
Impact
Haystack clients that let their users create and run Pipelines from scratch are vulnerable to remote code executions.
Certain Components in Haystack use Jinja2 templates, if anyone can create and render that template on the client machine they run any code.
Patches
The problem has been fixed with PRs deepset-ai/haystack#8095 and deepset-ai/haystack#8096.
Both have been released with Haystack 2.3.1.
Workarounds
Prevent users from running the affected Components, or only let users use preselected templates.
References
The list of impacted Components can be found in the release notes for 2.3.1.
https://github.com/deepset-ai/haystack/releases/tag/v2.3.1
- Record
PYSEC-2026-1447- CVSS 4.0
- 7.7 High
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 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
haystack-aiPyPI |
before 2.3.1 | 2.3.1 |
haystack-aiPyPI |
before 2.3.1, plus listed versions 2.0.02.0.0a12.0.0a22.0.0a32.0.0b1 Show 32 moreShow less2.0.0b22.0.0b32.0.0b42.0.0b52.0.0b62.0.0b72.0.0b82.0.0rc12.0.12.0.1rc12.0.1rc22.1.02.1.0rc12.1.0rc22.1.12.1.1rc12.1.22.1.2rc12.2.02.2.0rc12.2.0rc22.2.12.2.1rc12.2.22.2.2rc12.2.32.2.42.2.4rc12.3.02.3.0rc12.3.0rc22.3.1rc1 |
2.3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-41950 is a high vulnerability (CVSS 7.5) in Deepset Haystack, published July 31, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.17%, the 67th percentile. Fixed in haystack-ai 2.3.1.
References
github.com/deepset-ai/haystack/security/advisories/GHSA-hx9v-6r9f-w677