CVE-2015-2313: Capnproto

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

Sandstorm Cap'n Proto before 0.4.1.1 and 0.5.x before 0.5.1.2, when an application invokes the totalSize method on an object reader, allows remote peers to cause a denial of service (CPU consumption) via a crafted small message, which triggers a "tight" for loop. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-2312.

Affected products

• Capnproto Capnproto: up to and including 0.4.1.0; version 0.5.0.0 only; version 0.5.1.0 only; version 0.5.1.1 only

Published 2017-08-09. Last modified 2026-06-17.