# CVE-2026-74795 — scriban

> As of 2026-08-17, CVE-2026-74795 is a HIGH-severity vulnerability in scriban, CVSS v3.1 7.5, EPSS 0.3% (24.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-74795 as of 2026-08-17; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-17

## What is CVE-2026-74795?

Scriban before 6.6.0 contains an uncontrolled recursion vulnerability in its recursive-descent parser. The parser does not enforce a default expression depth limit (the ExpressionDepthLimit property in ParserOptions defaults to null/disabled), so an attacker who controls template input can supply a deeply nested template (e.g., thousands of nested parentheses or blocks) that exhausts thread stack space and raises a StackOverflowException. Because a StackOverflowException cannot be caught in .NET, this causes immediate, unrecoverable termination of the hosting process, resulting in a denial of service. Applications that process untrusted or user-supplied templates can be exploited remotely without authentication.

The record classifies CVE-2026-74795 under weakness class [CWE-674](https://intel.threadlinqs.com/cwe/CWE-674). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 50 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **CVSS v4.0 base score:** 8.7 (`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`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 24.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-16, last modified 2026-08-17

## Is CVE-2026-74795 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [scriban](https://intel.threadlinqs.com/vendors/scriban): scriban

## How to fix CVE-2026-74795

No vendor patch reference has been recorded for CVE-2026-74795 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-74795

No threat campaign in the Threadlinqs corpus currently references CVE-2026-74795, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-08-17.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/scriban/scriban/security/advisories/GHSA-wgh7-7m3c-fx25)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/scriban-before-denial-of-service-via-uncontrolled-recursion)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-74795
Full detection coverage and IOCs for threats exploiting CVE-2026-74795 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp