quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Quic-go Project
  • Quic-go

No data.

No data.

References
Link Providers
https://github.com/quic-go/quic-go/blob/v0.55.0/connection.go#L2682-L2685 cve-icon cve-icon cve-icon
https://github.com/quic-go/quic-go/pull/5354 cve-icon cve-icon cve-icon
https://github.com/quic-go/quic-go/security/advisories/GHSA-47m2-4cr7-mhcw cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-59530 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-59530 cve-icon
History

Tue, 21 Oct 2025 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Quic-go Project
Quic-go Project quic-go
Vendors & Products Quic-go Project
Quic-go Project quic-go

Thu, 16 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 10 Oct 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 10 Oct 2025 16:15:00 +0000

Type Values Removed Values Added
Description quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.
Title quic-go has Client Crash Due to Premature HANDSHAKE_DONE Frame
Weaknesses CWE-617
CWE-755
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-10-10T16:09:55.227Z

Updated: 2025-10-10T16:31:47.457Z

Reserved: 2025-09-17T17:04:20.373Z

Link: CVE-2025-59530

cve-icon Vulnrichment

Updated: 2025-10-10T16:31:41.920Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-10T16:15:52.387

Modified: 2025-10-14T19:36:59.730

Link: CVE-2025-59530

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-10T16:09:55Z

Links: CVE-2025-59530 - Bugzilla