Arbitrary property write via setter-visibility bypass
Published Aug 16, 2026 · Updated Aug 16, 2026
Improper access control in Scriban before 7.2.2 allows attackers to write CLR object properties via template assignment. TypedObjectAccessor exposes properties selected for reading to the write path as well, then calls PropertyInfo.SetValue without verifying that a setter is public or that an init-only setter is immutable after construction. Exploitation requires attacker-controlled template code in a host that passes live CLR objects into TemplateContext, after which rendered templates can persistently alter object state and security-relevant fields.
Summary
What happened
Improper access control in Scriban before 7.2.2 allows attackers to write CLR object properties via template assignment. TypedObjectAccessor exposes properties selected for reading to the write path as well, then calls PropertyInfo.SetValue without verifying that a setter is public or that an init-only setter is immutable after construction. Exploitation requires attacker-controlled template code in a host that passes live CLR objects into TemplateContext, after which rendered templates can persistently alter object state and security-relevant fields.
The record
- CVE
- CVE-2026-73061
- Published
- Aug 16, 2026
- Updated
- Aug 16, 2026
- Vendor
- Scriban
- Product
- Scriban
- Classifications
- CWE-284, T1565.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 16, 2026CVE publishedPublication date reported by the CVE source.
- Aug 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <7.2.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Template Writes to Arbitrary CLR Properties via TypedObjectAccessorproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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