# CVE-2026-19781

## Summary

- **CVE ID:** CVE-2026-19781
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** CWE-122
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

Ashlar-Vellum Cobalt VS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of VS files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28173.

## Affected Products

- Ashlar-Vellum — Cobalt (1204.204)

## References

- [CNA](https://www.zerodayinitiative.com/advisories/ZDI-26-587/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 7.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._