CVE-2026-115413 - AWS API MCP Server OAuth token audience validation bypass
CVE-2026-115413
Summary
Bulletin ID: 2026-086-AWS
Scope: AWS
Content Type: Important (requires attention)
Publication Date: 08/21/2026 10:30 AM PDT
Description:
FreeRTOS-Kernel is a real-time operating system kernel for microcontrollers and small microprocessors. AWS identified four issues with FreeRTOS-Kernel, affecting multiple versions.
- CVE-2026-77234: This issue affects configurations that use the FreeRTOS MPU together with software timers; applications that do not use the FreeRTOS MPU are not affected.
- CVE-2026-77235: This issue affects ARM TrustZone (ARMv8-M) configurations; applications that do not use ARM TrustZone secure contexts are not affected.
- CVE-2026-77236: This issue affects ARM TrustZone (ARMv8-M) configurations; applications that do not use ARM TrustZone secure contexts are not affected.
- CVE-2026-77237: This issue affects builds with queue sets enabled; applications built without queue sets are not affected.
Impacted versions:
- CVE-2026-77234: >=7.0.0 AND <=11.3.0 (MPU-enabled ports)
- CVE-2026-77235: >=10.2.0 AND <=11.3.0 (ARMv8-M ports with TrustZone + MPU)
- CVE-2026-77236: >=10.2.0 AND <=11.3.0 (ARMv8-M ports with TrustZone)
- CVE-2026-77237: >=7.4.0 AND <=11.3.0 (MPU-enabled ports with configUSE_QUEUE_SETS=1)
Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
Products covered
A separate affected-products list was not included in the collected bulletin.
Remediation
Separate remediation guidance was not included in the collected bulletin.
CVEs in this advisory 4
Update history
What changed in later vendor updates
SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.
- The vendor changed the advisory's last-updated date.
- The vendor changed the advisory's last-updated date.
- The vendor changed the advisory's last-updated date.
Updates
- Added to SecurityAlert
We collected the advisory from the official source.
- Published by AWS
The publication date reported by the vendor.
- Confirmed at the source
Our collector saw this advisory during a later source check.