CVE-2026-82447 Skyvern-AI CVE debrief

Who should care

Organizations using Skyvern versions before 1.0.45, as well as security teams and administrators responsible for patching and vulnerability management, should prioritize patching to prevent potential sandbox escape vulnerabilities. They should review the official CVE record, vendor advisories, and relevant source references to assess the vulnerability and its impact on their systems. Additionally, they should examine workflow parameters, upstream block output, and TextPromptBlock configurations for potential exposure and implement compensating controls, such as logging and exception tracking, to detect potential exploitation attempts. Affected operators and platforms should also review and restrict access to sensitive areas of the system to prevent unauthorized access or malicious activity.

Technical summary

The CVE-2026-82447 vulnerability in Skyvern's TextPromptBlock feature allows attackers to inject malicious Jinja template syntax, potentially leading to arbitrary code execution with server process privileges. The vulnerability is addressed in Skyvern version 1.0.45. To mitigate the vulnerability, organizations should apply patches or updates to Skyvern to version 1.0.45 or later. They should also review and restrict workflow parameters and upstream block output to prevent malicious Jinja template syntax injection. The vulnerability affects Skyvern versions before 1.0.45, and defenders should prioritize patching to prevent potential sandbox escape vulnerabilities.

Defensive priority

Organizations using Skyvern versions before 1.0.45 should prioritize patching to prevent potential sandbox escape vulnerabilities.

Recommended defensive actions

• Apply patches or updates to Skyvern to version 1.0.45 or later
• Review and restrict workflow parameters and upstream block output to prevent malicious Jinja template syntax injection
• Implement compensating controls, such as monitoring and exception tracking, to detect potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE-2026-82447 record indicates a sandbox escape vulnerability in Skyvern's TextPromptBlock feature, which could allow attackers to execute arbitrary code with server process privileges. However, detailed information about the vulnerability and affected configurations is limited in the provided source corpus. To verify and assess the vulnerability, defenders should review the official CVE record, vendor advisories, and relevant source references. They should also examine workflow parameters, upstream block output, and TextPromptBlock configurations for potential exposure. Additionally, defenders should monitor for suspicious activity and implement compensating controls, such as logging and exception tracking, to detect potential exploitation attempts.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.