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I. Basic Information for CVE-2026-21438
Vulnerability Information

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Vulnerability Title
webtransport-go affected by a Memory Exhaustion Attack due to Missing Cleanup of Streams Map
Source: NVD (National Vulnerability Database)
Vulnerability Description
webtransport-go is an implementation of the WebTransport protocol. Prior to 0.10.0, an attacker can cause unbounded memory consumption repeatedly creating and closing many WebTransport streams. Closed streams were not removed from an internal session map, preventing garbage collection of their resources. This vulnerability is fixed in v0.10.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: NVD (National Vulnerability Database)
Vulnerability Title
webtransport-go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
webtransport-go是quic-go开源的一个Go语言库。 webtransport-go 0.10.0之前版本存在安全漏洞,该漏洞源于已关闭的流未从内部会话映射中移除,可能导致内存无限制消耗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
quic-gowebtransport-go < 0.10.0 -
II. Public POCs for CVE-2026-21438
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III. Intelligence Information for CVE-2026-21438
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IV. Related Vulnerabilities
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