CVE-2023-39427: Ashlar Argon

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applications lack proper validation of user-supplied data when parsing XE files. This could lead to an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.

Affected products

• Ashlar Argon: before 12.4.1204.200 (fixed in 12.4.1204.200)
• Ashlar Cobalt: before 12.4.1204.200 (fixed in 12.4.1204.200)
• Ashlar Graphite: up to and including 13.0.48
• Ashlar Lithium: before 12.4.1204.200 (fixed in 12.4.1204.200)
• Ashlar Xenon: before 12.4.1204.200 (fixed in 12.4.1204.200)

Published 2023-10-26. Last modified 2026-06-17.