CVE-2026-74795Public exploitNetwork attack vectorHinoki check available

Process crash via uncontrolled parser recursion

Published Aug 16, 2026 · Updated Aug 17, 2026

Denial of service in the parser in Scriban before 6.6.0 allows remote attackers to crash the hosting process via nested templates. The recursive-descent parser leaves ParserOptions.ExpressionDepthLimit null by default, so deeply nested parentheses or blocks recurse until the .NET stack overflows and raises an uncatchable StackOverflowException. Exposure requires acceptance of untrusted or user-supplied template input; successful exploitation terminates the entire process and interrupts service until restart.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in the parser in Scriban before 6.6.0 allows remote attackers to crash the hosting process via nested templates. The recursive-descent parser leaves ParserOptions.ExpressionDepthLimit null by default, so deeply nested parentheses or blocks recurse until the .NET stack overflows and raises an uncatchable StackOverflowException. Exposure requires acceptance of untrusted or user-supplied template input; successful exploitation terminates the entire process and interrupts service until restart.

The record

CVE
CVE-2026-74795
Published
Aug 16, 2026
Updated
Aug 17, 2026
Vendor
Scriban
Product
Scriban
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=0 <6.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Scriban · Scribanversion=0 <6.6.0

Published CVSS scores

8.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Application or System Exploitation

Public exploit references

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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