Uncontrolled Recursion in wire - #VU164389
Published: November 10, 2026
Vulnerability identifier: #VU164389
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: N/A
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
wire
Remediation
Install security update from vendor's website.
wire - update to 7.0.004