CVE-2026-63306

HIGH 8.6

stoatchat before 0.13.5 Unauthenticated SSRF via proxy and embed endpoints

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

stoatchat before 0.13.5 contains an unauthenticated server-side request forgery vulnerability in the /proxy and /embed endpoints that accept arbitrary URLs without DNS resolution filtering or private IP range validation. Attackers can enumerate internal services, fingerprint applications, and reach instance metadata endpoints by supplying malicious URLs or leveraging redirect chains to access internal infrastructure.

CWE	CWE-918
Vendor	stoatchat
Product	stoatchat
Published	Jul 16, 2026
Last Updated	Jul 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

stoatchat / stoatchat

0 < 0.13.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/stoatchat/stoatchat/security/advisories/GHSA-xhww-5g9p-vvq5 vulncheck.com: https://www.vulncheck.com/advisories/stoatchat-before-unauthenticated-ssrf-via-proxy-and-embed-endpoints

Credits

🔍 AzureADTrent