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CVE Watch13 de out. de 2026

CVE-2026-81535

In wolfSSH through 1.5.0 built with --enable-fwd, DoChannelOpen() in src/internal.c gates only direct-tcpip channel opens with the forwardin

CVSS

9.1

Crítica

EPSS

0.3%

p23

KEV

—

Exploit Today

7

0-100

Publicado: 7 de out. de 2026 · Última mod.: 13 de out. de 2026 · CWE-862 · CWE-863

EPSS · 30d
0.3%EPSS · 30 dias0.3%
2026-10-082026-11-05
Descrição técnica

In wolfSSH through 1.5.0 built with --enable-fwd, DoChannelOpen() in src/internal.c gates only direct-tcpip channel opens with the forwarding policy callback. forwarded-tcpip opens are admitted without an authorization check and are not capped in number, allowing a malicious SSH peer to make an endpoint allocate unbounded per-channel buffers for forwarding channels the application never authorized. A client also does not check a forwarded-tcpip open against the forwards it registered with a tcpip-forward request, as RFC 4254 section 7.2 requires, so a malicious server can open forwarding channels for addresses and ports the client never asked it to forward.

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