Medium severity5.3NVD Advisory· Published Feb 12, 2026· Updated Jun 17, 2026
CVE-2026-21438
CVE-2026-21438
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/quic-go/webtransport-goGo | < 0.10.0 | 0.10.0 |
Affected products
29cpe:2.3:a:quic-go:webtransport-go:*:*:*:*:*:go:*:*+ 1 more
- cpe:2.3:a:quic-go:webtransport-go:*:*:*:*:*:go:*:*range: <0.10.0
- (no CPE)range: < 0.10.0
- osv-coords27 versionspkg:apk/chainguard/ipfs-clusterpkg:apk/chainguard/ipfs-cluster-fipspkg:apk/chainguard/k3spkg:apk/chainguard/k3s-1.32pkg:apk/chainguard/k3s-1.33pkg:apk/chainguard/k3s-staticpkg:apk/chainguard/k3s-static-1.31pkg:apk/chainguard/k3s-static-1.32pkg:apk/chainguard/kubopkg:apk/chainguard/rke2-runtime-1.31pkg:apk/chainguard/rke2-runtime-1.32pkg:apk/chainguard/rke2-runtime-1.33pkg:apk/chainguard/rke2-runtime-1.34pkg:apk/chainguard/rke2-runtime-1.35pkg:apk/chainguard/spegelpkg:apk/chainguard/spegel-fipspkg:apk/wolfi/ipfs-clusterpkg:apk/wolfi/k3spkg:apk/wolfi/k3s-1.32pkg:apk/wolfi/k3s-1.33pkg:apk/wolfi/k3s-staticpkg:apk/wolfi/k3s-static-1.32pkg:apk/wolfi/kubopkg:apk/wolfi/spegelpkg:golang/github.com/quic-go/webtransport-gopkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 1.1.5-r5+ 26 more
- (no CPE)range: < 1.1.5-r5
- (no CPE)range: < 1.1.5-r4
- (no CPE)range: < 1.35.1.1-r1
- (no CPE)range: < 1.32.13.1-r2
- (no CPE)range: < 1.33.9.1-r3
- (no CPE)range: < 1.35.1.1-r1
- (no CPE)range: < 1.31.6.1-r13
- (no CPE)range: < 1.32.13.1-r2
- (no CPE)range: < 0.39.0-r5
- (no CPE)range: < 1.31.14.2.1-r8
- (no CPE)range: < 1.32.12.2.1-r2
- (no CPE)range: < 1.33.8.2.1-r2
- (no CPE)range: < 1.34.4.2.1-r2
- (no CPE)range: < 1.35.1.2.1-r2
- (no CPE)range: < 0.6.0-r4
- (no CPE)range: < 0.6.0-r4
- (no CPE)range: < 1.1.5-r5
- (no CPE)range: < 1.35.1.1-r1
- (no CPE)range: < 1.32.13.1-r2
- (no CPE)range: < 1.33.9.1-r3
- (no CPE)range: < 1.35.1.1-r1
- (no CPE)range: < 1.32.13.1-r2
- (no CPE)range: < 0.39.0-r5
- (no CPE)range: < 0.6.0-r4
- (no CPE)range: < 0.10.0
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-2f2x-8mwp-p2gcghsaADVISORY
- github.com/quic-go/webtransport-go/security/advisories/GHSA-2f2x-8mwp-p2gcnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-21438ghsaADVISORY
- github.com/quic-go/webtransport-go/releases/tag/v0.10.0nvdProductRelease NotesWEB
News mentions
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