Vulnerability · Published Aug 16, 2026 · Assigned by VulnCheck

CVE-2026-74790Scriban before 7.0.0 MemberFilter Bypass via TemplateContext Cache

Critical 9.1

In plain English

A critical-severity security flaw in scriban from scriban. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.5%top 59.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
NuGet	scriban	7.0.0	GHSA-5wr9-m6jw-xx44
NuGet	scriban.signed	7.0.0	GHSA-5wr9-m6jw-xx44

Affected products (as reported)

Vendor	Product	Versions
scriban	scriban	0 – before 7.0.0

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-5wr9-m6jw-xx44) vendor-advisory
VulnCheck Advisory: Scriban before 7.0.0 MemberFilter Bypass via TemplateContext Cache third-party-advisory