{"id":52100,"date":"2025-06-15T03:00:55","date_gmt":"2025-06-15T03:00:55","guid":{"rendered":""},"modified":"2025-07-05T17:23:09","modified_gmt":"2025-07-05T23:23:09","slug":"cve-2025-49619-jinja-runtime-leak-vulnerability-in-skyvern","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-49619-jinja-runtime-leak-vulnerability-in-skyvern\/","title":{"rendered":"CVE-2025-49619: Jinja Runtime Leak Vulnerability in Skyvern<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The CVE-2025-49619 is a significant cybersecurity vulnerability that affects Skyvern up to version 0.1.85. The vulnerability lies within the Jinja runtime leak located in the sdk\/workflow\/models\/block.py component of the software. This vulnerability matters greatly because it can potentially lead<\/a> to system compromise and data leakage if exploited by malicious actors. Companies depending on Skyvern software, particularly those dealing with sensitive data<\/a>, should be aware of this vulnerability and take immediate steps to mitigate the risk.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-49619
\nSeverity: High 8.5 (CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/a><\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Skyvern | Up to 0.1.85<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of the Jinja runtime leak in the sdk\/workflow\/models\/block.py component, which allows an attacker to inject malicious code<\/a> into the application. This code could potentially lead<\/a> to unauthorized access to the system and its data. The vulnerability occurs due to improper<\/a> validation of user-supplied input within the affected software.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here’s a conceptual example of how this vulnerability might be exploited.<\/p>\n

from jinja2 import Environment, select_autoescape\n# Establishing the Jinja environment\nenv = Environment(autoescape=select_autoescape(['html', 'xml']))\n# Loading the vulnerable template\ntemplate = env.get_template('sdk\/workflow\/models\/block.py')\n# Injecting malicious payload\nmalicious_payload = \"{% for item in [7,3,2,1] %}{{ item }}{% endfor %}\"\nrendered_template = template.render(malicious_payload=malicious_payload)\nprint(rendered_template)<\/code><\/pre>\n
This example Python code snippet demonstrates how an attacker could use Jinja<\/a> template injection to execute arbitrary Python code within the application’s context, leading to system compromise or data leakage.<\/p>\n
How to Mitigate the Vulnerability<\/strong><\/p>\n
To mitigate the impact of this vulnerability<\/a>, users and administrators are recommended to apply the vendor patch as soon as it becomes available. Until then, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as a temporary mitigation measure. These systems can help detect and block potential<\/a> exploits. However, they should not be relied upon as a permanent solution.<\/p>\n
Note<\/strong>
\n: This post is intended for educational purposes only. It does not condone or promote malicious activities. Always practice ethical hacking.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The CVE-2025-49619 is a significant cybersecurity vulnerability that affects Skyvern up to version 0.1.85. The vulnerability lies within the Jinja runtime leak located in the sdk\/workflow\/models\/block.py component of the software. This vulnerability matters greatly because it can potentially lead to system compromise and data leakage if exploited by malicious actors. Companies depending on Skyvern […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[78],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-52100","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-injection"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t