CVE-2026-21438

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Source
https://cve.org/CVERecord?id=CVE-2026-21438
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21438.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-21438
Aliases
Downstream
Related
Published
2026-02-12T18:25:34.107Z
Modified
2026-03-04T22:28:57.064417Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
webtransport-go affected by a Memory Exhaustion Attack due to Missing Cleanup of Streams Map
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-401",
        "CWE-459"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21438.json"
}
References

Affected packages

Git / github.com/quic-go/webtransport-go

Affected ranges

Type
GIT
Repo
https://github.com/quic-go/webtransport-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9d448b125754f4c83064afb2c586221214e55eec

Affected versions

v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.6.0
v0.7.0
v0.8.0
v0.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21438.json"