VulnSocial

CVE-2026-63374

LOW

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

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0.0/ 10 priority

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-20: 109-20
Full discourse1 post
  • Upwind Security MDR@UpwindMDR

    🚨Critical - AnyIO TLS IDNA Hostname Validation Bypass (CVE-2026-63374) AnyIO mishandles internationalized (non-ASCII) domain names in TLS connections via connect_tcp() and TLSStream.wrap(). If an attacker hijacks/redirects traffic, they can present a cert for the IDNA 2003-encoded hostname that still validates, enabling TLS certificate spoofing against clients. ASCII-only hostnames are not affected. 👉Affected: anyio < 4.14.2 | Upgrade to 4.14.2

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