Heap-based Buffer Overflow Vulnerability in Ashlar-Vellum Cobalt
CVE-2026-19781

7.8HIGH

Key Information:

Vendor

Ashlar-vellum

Status
Cobalt
Vendor
CVE Published:
15 September 2026

What is CVE-2026-19781?

A vulnerability exists in the Ashlar-Vellum Cobalt software due to improper validation of user-supplied data when parsing VS files. This oversight can lead to a heap-based buffer overflow, enabling attackers to execute arbitrary code if a user visits a malicious web page or opens a compromised file. Proper security measures are essential to mitigate the risks associated with this flaw.

Affected Version(s)

Cobalt 1204.204

References

https://www.zerodayinitiative.com/advisories/ZDI-26-587/
x_research-advisory

CVSS V3.0

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.