Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Scriban versions before 7.0.0, and the Scriban.Signed package before 7.0.0, can be made to exhaust memory or CPU by evaluating a template containing crafted expressions, such as large string multiplication, large BigInteger shifts, or range enumeration inside builtin functions. An attacker who can supply a template to the application can crash the host process or stall it, and the default LoopLimit and LimitToString settings do not stop these paths. Upgrade to Scriban or Scriban.Signed 7.0.0 or later. The source gives no workaround beyond not evaluating untrusted templates.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.1 | High | 4.0 | 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 | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0048, the 41st percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:21 UTC First seen by agentprime
- 31 Oct 2026, 15:21 UTC Confirmed by OSV