SB2026072885 - Type Confusion in start-server-core

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Main Vulnerability Database SB2026072885

SB2026072885 - Type Confusion in start-server-core

Published: July 28, 2026

Security Bulletin ID SB2026072885
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Type Confusion (CVE-ID: N/A)

CWE-ID: CWE-843 - Type confusion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to invoke a different client-referenced server function as a side effect of request deserialization.

The vulnerability exists due to type confusion in the inbound server-function request deserialization logic when processing a crafted JSON request body. A remote attacker can send a specially crafted request body to invoke a sibling client-referenced server function as a side effect of deserialization.

The inner invocation does not re-run request-level middleware, while the target function's per-function middleware chain still executes. Server-only functions cannot be reached through this mechanism.


Remediation

Install update from vendor's website.

References