CVE-2026-66776: SAP Approuter

Medium severity, CVSS 5.9. EPSS: 0.2% chance of exploitation in the next 30 days.

SAP Approuter does not consistently enforce integrity verification on certain session-related request headers under specific conditions. An attacker with low privileges could send a specially crafted request that bypasses the integrity check and loads another user's session context. Successful exploitation requires the attacker to have previously observed matching session values out-of-band, which makes the attack complex to execute. This could result in a high impact on confidentiality and a low impact on integrity. There is no impact on availability.

Affected products

• SAP Approuter: before 23.0.0 (fixed in 23.0.0)

Published 2026-08-11. Last modified 2026-09-08.