CVE-2025-59530
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.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-617, CWE-755
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-47m2-4cr7-mhcw | Go | github.com/quic-go/quic-go | <0.49.1 | 0.49.1 |
| GHSA-47m2-4cr7-mhcw | Go | github.com/quic-go/quic-go | >=0.50.0 <0.54.1 | 0.54.1 |
| GO-2025-4017 | Go | github.com/quic-go/quic-go | <0.49.1 >=0.50.0 <0.54.1 | 0.49.1, 0.54.1 |