CVE-2026-21434
MEDIUM5.3EPSS 0.02%webtransport-go: Memory Exhaustion Attack due to Missing Length Check in WT_CLOSE_SESSION Capsule in github.com/quic-go/webtransport-go
Published: 2/12/2026Modified: 2/23/2026
Description
webtransport-go: Memory Exhaustion Attack due to Missing Length Check in WT_CLOSE_SESSION Capsule in github.com/quic-go/webtransport-go
Affected packages (3)
- Go/github.com/marten-seemann/webtransport-go>= 0.3.0
- Go/github.com/quic-go/webtransport-go>= 0.3.0, < 0.10.0
- Go/github.com/quic-go/webtransport-gofrom 0, < 0.10.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |