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Deno: Denial of service via non-ASCII bytes in WebSocket response headers

🗓️ 17 Jun 2026 18:48:18Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 29 Views

Deno WebSocket client may crash when server returns non-ASCII bytes in handshake headers.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-55517
23 Jun 202617:24
–attackerkb
alpinelinux
AlpineLinux
CVE-2026-55517
23 Jun 202617:24
–alpinelinux
circl
Circl
CVE-2026-55517
29 Jun 202613:57
–circl
cve
CVE
CVE-2026-55517
23 Jun 202617:24
–cve
cvelist
Cvelist
CVE-2026-55517 Deno: Denial of service via non-ASCII bytes in WebSocket response headers
23 Jun 202617:24
–cvelist
euvd
EUVD
EUVD-2026-38549
23 Jun 202617:24
–euvd
mend
Mend
CVE-2026-55517
23 Jun 202617:24
–mend
nvd
NVD
CVE-2026-55517
23 Jun 202618:18
–nvd
osv_ghsa
osv_ghsa
GHSA-X2QC-CMH9-F4HF Deno: Denial of service via non-ASCII bytes in WebSocket response headers
17 Jun 202618:48
–osv_ghsa
osv_jlsec
osv_jlsec
JLSEC-2026-1167 Deno: Denial of service via non-ASCII bytes in WebSocket response headers
5 Aug 202618:20
–osv_jlsec
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Vulners
Node
denodenoRange≤2.7.4rust

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17 Jun 2026 18:48Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.3
EPSS0.00315
SSVC
29