CVE-2026-74788: high-severity vulnerability in scriban
Scriban before 7.0.0 Denial of Service via string.pad_left/pad_right
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
scriban · scribanRelated CVEs — scriban
In the same product, most dangerous first.
CVE-2026-74789HIGHScriban before 7.0.0 LoopLimit Bypass via Built-in OperationsEPSS 0.6%CVE-2026-74795HIGHScriban before 6.6.0 Denial of Service via Uncontrolled RecursionEPSS 0.6%CVE-2026-74792HIGHScriban before 7.0.0 Stack Overflow via nested array initializersEPSS 0.5%CVE-2026-74794HIGHScriban before 6.6.0 Denial of Service via Infinite RecursionEPSS 0.5%CVE-2026-74787HIGHScriban before 7.0.0 Uncontrolled Recursion via object.to_jsonEPSS 0.5%CVE-2026-73062HIGHScriban 3.0.0 through 7.2.0 Denial of Service via Array MultiplicationEPSS 0.5%