CVE-2026-74788

Scriban before 7.0.0 (affected versions <= 6.6.0) contains an uncontrolled memory allocation vulnerability in the string.pad_left and string.pad_right template functions, which perform no validation on the width parameter before delegating to .NET's String.PadLeft/PadRight. When an application exposes Scriban to untrusted template input, an attacker can supply an arbitrarily large width value (e.g., 500,000,000) to trigger ~1GB memory allocations in a single call, resulting in OutOfMemoryException and denial of service. The TemplateContext.LimitToString limit does not prevent this because it is only enforced after the string has been fully allocated.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/scriban/scriban/security/advisories/GHSA-v66j-x4hw-fv9g
https://www.vulncheck.com/advisories/scriban-before-denial-of-service-via-string-pad-left-pad-right
https://github.com/scriban/scriban/security/advisories/GHSA-v66j-x4hw-fv9g

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-16 14:16

Updated : 2026-08-31 20:30

NVD link : CVE-2026-74788

Mitre link : CVE-2026-74788

CVE.ORG link : CVE-2026-74788

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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