CVE-2026-74786: high-severity vulnerability in scriban
Scriban before 7.0.0 Denial of Service via Unbounded Template Output
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.5%
Scriban before 7.0.0 (affected versions <= 6.6.0) contains a denial-of-service vulnerability in which the LimitToString safety limit (default 1MB) can be bypassed because ObjectToString resets the per-call length counter (_currentToStringLength) on every top-level call and StringBuilderOutput enforces no cumulative output-size limit. An attacker who can supply a template can render a near-limit string repeatedly in a loop, allocating approximately 1GB of memory and causing an out-of-memory condition that crashes the host application.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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-2026-74788HIGHScriban before 7.0.0 Denial of Service via string.pad_left/pad_rightEPSS 0.5%CVE-2026-74787HIGHScriban before 7.0.0 Uncontrolled Recursion via object.to_jsonEPSS 0.5%