CVE-2026-74794 scriban CVE debrief

Who should care

Organizations using Scriban for templating should prioritize upgrading to version 6.6.0 or later to mitigate this vulnerability. Security teams and developers responsible for maintaining Scriban-based applications should review and limit the ObjectRecursionLimit property to prevent potential denial-of-service attacks. Additionally, organizations with Scriban-based applications should verify their versions and monitor for circular reference objects in the template context. This vulnerability affects organizations with Scriban-based applications, particularly those with unvalidated user input, and requires attention from security teams and developers to prevent potential attacks. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed and addressed accordingly. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified. Monitoring, detection, and logs for exposed assets that need extra review should be checked. Exceptions, retest remediated assets, and close the item only after evidence is documented should be tracked. Asset inventory and rollback/change windows should be considered in the remediation process. Source tracking should also be implemented to monitor for potential attacks. The CVE-2026-74794 vulnerability requires attention from security teams and developers to prevent potential attacks and protect against denial-of-service attacks via infinite recursion in Scriban versions before 6.6.0. Security teams should prioritize upgrading to version 6.6.0 or later and review and limit the ObjectRecursionLimit property to prevent potential denial-of-service attacks. Security teams should also review and address affected operator, platform, vulnerability-management, and security-team impact. Compensating controls, monitoring, asset inventory, rollback/change windows, and source tracking should be considered in the remediation process. The CVE-2026-74794 vulnerability affects organizations using Scriban for templating and requires attention from security teams and developers to prevent potential attacks and protect against denial-of-service attacks via infinite

Technical summary

The CVE-2026-74794 vulnerability in Scriban versions before 6.6.0 allows for a denial-of-service attack via infinite recursion. The ObjectRecursionLimit property defaults to unlimited, enabling attackers to supply circular reference objects to the template context, which can exhaust stack space and trigger an uncatchable StackOverflowException, terminating the hosting process. This vulnerability affects Scriban-based applications, particularly those with unvalidated user input. Security teams and developers responsible for maintaining Scriban-based applications should review and limit the ObjectRecursionLimit property to prevent potential denial-of-service attacks.

Defensive priority

Organizations using Scriban should verify their versions and upgrade to 6.6.0 or later to mitigate this vulnerability.

Recommended defensive actions

• Verify Scriban version and upgrade to 6.6.0 or later
• Review and limit ObjectRecursionLimit property
• Monitor for circular reference objects in template context
• 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
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE-2026-74794 vulnerability in Scriban versions before 6.6.0 allows for a denial-of-service attack via infinite recursion. The ObjectRecursionLimit property defaults to unlimited, enabling attackers to supply circular reference objects to the template context, which can exhaust stack space and trigger an uncatchable StackOverflowException, terminating the hosting process. Evidence is based on official CVE Program and NVD records, as well as advisories from Vulncheck.

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.