SB20261110276 - Uncontrolled Recursion in wire

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Main Vulnerability Database SB20261110276

SB20261110276 - Uncontrolled Recursion in wire

Published: November 10, 2026

Security Bulletin ID SB20261110276
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Uncontrolled Recursion (CVE-ID: N/A)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service by crashing applications using the Wire Swift runtime.

The vulnerability exists due to uncontrolled recursion in ProtoReader.skipGroup() when processing nested protobuf START_GROUP fields without enforcing the recursion-depth limit. A remote attacker can submit a crafted protobuf message containing repeated 0x0B bytes to exhaust the native thread stack and terminate the decoding process.


Remediation

Install update from vendor's website.

References