CVE-2026-12813 activepieces CVE debrief

Who should care

Defenders of activepieces installations, especially those using versions up to 0.83.0, should prioritize patching this vulnerability. The public availability of an exploit increases the urgency for remediation. Security teams responsible for web applications and server-side software should review and update their systems accordingly.

Technical summary

The CVE-2026-12813 vulnerability is caused by a weakness in the handleUrlFile function within the activepieces package, specifically in the file /packages/server/engine/src/lib/variables/processors/file.ts. This function is susceptible to server-side request forgery (SSRF) attacks, allowing an attacker to manipulate the server into making unintended requests. The vulnerability has been publicly disclosed and an exploit is available, making it a priority for defenders to update to a patched version.

Defensive priority

Patching is recommended due to public exploit availability and potential for SSRF attacks.

Recommended defensive actions

• Apply the official patch or upgrade to a version beyond 0.83.0.
• Review and restrict access to the handleUrlFile function if possible.
• Implement additional monitoring for suspicious server requests.
• Verify the integrity of server-side requests to prevent SSRF.
• Consider compensating controls such as web application firewalls (WAFs) to detect and prevent SSRF attacks.

Evidence notes

The primary evidence for this vulnerability comes from the NVD and Vuldb sources. The vulnerability affects activepieces up to version 0.83.0. The handleUrlFile function in /packages/server/engine/src/lib/variables/processors/file.ts is the specific component impacted. Defenders should verify the version of activepieces in use and confirm if it is within the affected range.

Official resources