CVE-2026-74787
Unbounded recursion in Scriban to_json can crash .NET hosts (fatal StackOverflow).
Is CVE-2026-74787 being exploited?
Not confirmed. CVE-2026-74787 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-74787?
CVE-2026-74787 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74787?
Yes. A fix has been recorded for CVE-2026-74787. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74787 affect?
CVE-2026-74787 affects Scriban < 7.0.0, Any .NET application using Scriban's to_json builtin. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74787?
Upgrade Scriban to >=7.0.0; sanitize/sandbox template input and limit recursion depth.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-supplied templates can trigger unbounded recursion in to_json, causing StackOverflowException and terminating the hosting .NET process (denial of service).
Patch when possible
- affected< 7.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.