# CVE-2025-49619: Skyvern has a Jinja runtime leak

> Authenticated users can achieve remote code execution via server-side template injection in Skyvern workflow blocks.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Jun 2025
- **Updated:** 17 Jun 2025
- **Also known as:** GHSA-h92g-3xc3-ww2r, PYSEC-2026-1929

## What is CVE-2025-49619?

CVE-2025-49619 is a high-severity code injection vulnerability in Skyvern, published on 7 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Skyvern through 0.1.85 is vulnerable to server-side template injection (SSTI) in the Prompt field of workflow blocks such as the Navigation v2 Block. Improper sanitization of Jinja2 template input allows authenticated users to inject crafted expressions that are evaluated on the server, leading to blind remote code execution (RCE).

Weakness: CWE-1336 (Improper Neutralization of Special Elements Used in a Template Engine)

## Which versions are affected by CVE-2025-49619?

3 open source packages ship an affected version, including skyvern.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `skyvern` | PyPI | All versions to 0.2.0 | None |
| `skyvern` | PyPI | All versions to 0.2.0 | None |
| `skyvern` | PyPI | All versions to 0.2.0 | None |

## How do I fix CVE-2025-49619?

No fix has been published for CVE-2025-49619 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-49619 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49619 exists.

Public exploit code:

- This script exploits CVE-2025-49619 in Skyvern to execute a reverse shell command. (github_poc): https://github.com/cristibtz/CVE-2025-49619
- Skyvern SSTI Remote Code Execution (metasploit)
- Skyvern 0.1.85 - Remote Code Execution (RCE) via SSTI (exploitdb)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-49619 and fix it if it is affected.

What it is: CVE-2025-49619 is a high-severity code injection vulnerability in Skyvern, published on 7 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49619 exists.

Affected packages and fixed versions:
- skyvern (PyPI): affected all versions up to 0.2.0; no fix listed
- skyvern (PyPI): affected all versions up to 0.2.0; no fix listed
- skyvern (PyPI): affected all versions up to 0.2.0; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-49619/ (Markdown: https://insights.sbomify.com/CVE-2025-49619/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-49619
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-49619
- OSV: https://osv.dev/vulnerability/CVE-2025-49619

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-49619/
Summaries are generated and may contain mistakes; the official description above is the record.