Critical Alert 2 Active Exploits Detected Today

CVE-2026-72530 TrueConf Server Code Injection Vulnerability →
CVE-2026-72529 TrueConf Server Missing Authentication for Critical Function Vulnerability →
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August 21, 2026

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CVE-2026-74905NVD

Vulnerability Summary

SiYuan before v3.7.4 contains a server-side request forgery (SSRF) vulnerability in the isPrivateIP function in kernel/util/net.go, used by SSRFSafeDialer to enforce SSRF protection in SafeMode. The function only checks for loopback, link-local unicast, private, and unspecified addresses and does not recognize IPv6 transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo 2001::/32) that embed private IPv4 destinations. When SafeMode is enabled, an authenticated attacker can bypass the SSRF guard via the network forward proxy, WebSocket proxy, or SSE proxy endpoints by supplying a URL whose hostname resolves to such a transition address, reaching internal services and cloud metadata endpoints (e.g., 169.254.169.254). Because the forward proxy returns the full response body, this is a full-read SSRF that can be used to steal instance credentials, reach internal services, and port-scan internal infrastructure.
Severity Level
HIGH(7.1)
Published Date
Aug 18, 2026
Last Modified
Aug 18, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.32%Probability
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone