Wire has Uncontrolled Recursion on Nested Groups

published 2025-03-16 19 mo ago modified 2026-09-10 1 mo ago also GHSA-pwf9-q62p-v7wc , EUVD-2024-54086

cvss: 5.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

Square Wire before 5.2.0 does not enforce a recursion limit on nested groups in ByteArrayProtoReader32.kt and ProtoReader.kt.

Patch / fix

fixed in 2 links 1

maven com.squareup.wire:wire-runtime 5.2.0
Square Wire 5.2.0

github.com/square/wire@b90e60c commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 19 mo ago (2025-03-17)

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
GitHub	3.1	5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
maven	com.squareup.wire:wire-runtime	<5.2.0	5.2.0

Affected products

Square Wire

Classification

Weakness

CWE-674 Uncontrolled Recursion

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary