CVE-2026-74790
Received Received - Intake

Scriban TemplateContext MemberFilter Bypass via Cached TypedObjectAccessor

Publication date: 2026-08-16

Last updated on: 2026-08-16

Assigner: VulnCheck

Description
Scriban before 7.0.0 caches TypedObjectAccessor by Type only without considering MemberFilter changes, allowing reused TemplateContext instances to expose members that should be hidden. Attackers can access filtered properties and fields by reusing a TemplateContext after tightening its MemberFilter, bypassing sandbox policies across requests or tenants.

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Meta Information

Published
2026-08-16
Last Modified
2026-08-16
Generated
2026-08-16
AI Q&A
2026-08-16
EPSS Evaluated
N/A
NVD
CVE-2026-74790
EUVD
EUVD-2026-59956

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
scriban scriban to 7.0.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-693 The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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Executive Summary

This vulnerability affects Scriban before version 7.0.0. It involves improper caching of TypedObjectAccessor by Type without considering changes to MemberFilter. Attackers can reuse a TemplateContext instance to access members that should be hidden, bypassing sandbox policies across requests or tenants.

Detection Guidance

This vulnerability is specific to Scriban library versions before 7.0.0. Check your Scriban version with commands like 'dotnet list package' for .NET or inspect dependency files in your project. If using NuGet, run 'nuget list Scriban' to verify installed versions.

Impact Analysis

This flaw allows unauthorized access to filtered properties and fields, potentially exposing sensitive data. It can lead to sandbox escape, enabling attackers to bypass intended access controls across different requests, users, or tenants when contexts are reused.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating confidentiality requirements in GDPR and HIPAA. It may result in non-compliance due to insufficient protection of sensitive information.

Mitigation Strategies

Upgrade Scriban to version 7.0.0 or later immediately. If upgrading is not possible, avoid reusing TemplateContext instances across requests or tenants. Ensure TemplateContext.Reset() is called before each use to clear cached accessors.

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