Process crash via unlimited object recursion
Published Aug 16, 2026 · Updated Aug 17, 2026
Uncontrolled recursion in object rendering in Scriban before 6.6.0 allows remote attackers to crash the hosting process via cyclic objects. When Scriban renders an object such as {{ obj }}, TemplateContext recursively walks object members, and the default ObjectRecursionLimit value of 0 leaves circular references unbounded. Exposure depends on attacker influence over objects or template context data; one self-referential graph can exhaust the .NET thread stack and raise an uncatchable StackOverflowException that terminates the process.
Summary
What happened
Uncontrolled recursion in object rendering in Scriban before 6.6.0 allows remote attackers to crash the hosting process via cyclic objects. When Scriban renders an object such as {{ obj }}, TemplateContext recursively walks object members, and the default ObjectRecursionLimit value of 0 leaves circular references unbounded. Exposure depends on attacker influence over objects or template context data; one self-referential graph can exhaust the .NET thread stack and raise an uncatchable StackOverflowException that terminates the process.
The record
- CVE
- CVE-2026-74794
- Published
- Aug 16, 2026
- Updated
- Aug 17, 2026
- Vendor
- Scriban
- Product
- Scriban
- Classifications
- CWE-674, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 16, 2026CVE publishedPublication date reported by the CVE source.
- Aug 17, 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 <6.6.0
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
- GHSA-grr9-747v-xvcp proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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