Vulnerability Report

CVE-2026-46727

Title: CVE-2026-46727

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2026-46727.

CWE Category CWE-362

Published Date May 22, 2026

Modified Date May 26, 2026

Exploit Status Not Found

Score 8.1 CVSS v3.1

Exploit Probability (EPSS)

0.16%

Vulnerability Summary

CVE-2026-46727: An issue was discovered in Ruby 4 before 4.0.5. A race condition leading to a use-after-free in the pthread-based getaddrinfo timeout handler (rb_getaddrinfo in ext/socket/raddrinfo.c) allows a remote attacker who can delay DNS responses near the user-specified timeout to crash a Ruby process that calls Addrinfo.getaddrinfo(..., timeout:) or Socket.tcp(..., resolv_timeout:). Memory-corruption-based exploitation is theoretically possible. The attack could, for example, be carried out through a crafted authoritative DNS server or recursive resolver.

Impacted Vendors

yukihiro_matsumoto 1

ruby-lang 1

Reference Links

https://hackerone.com/reports/3607434 https://www.ruby-lang.org/en/news/2026/05/20/getaddrinfo-cve-2026-46727/

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.1

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-46727 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

May 26, 2026 MODIFIED

Vulnerability data updated via NVD.

May 22, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.