SSRF Vulnerability in Stoatchat Affects Unauthenticated Users
CVE-2026-73058

6.9MEDIUM

Key Information:

Vendor

Stoatchat

Status
Stoatchat
Vendor
CVE Published:
16 August 2026

What is CVE-2026-73058?

Versions of Stoatchat prior to 0.15.0 are susceptible to a Server-Side Request Forgery (SSRF) vulnerability due to inadequate filtering of the IPv6 unspecified address (::) in the blocklist. This flaw permits unauthenticated attackers to exploit the /proxy and /embed endpoints, crafting requests that leverage IPv6 literal syntax. Through this exploitation, attackers can gain unauthorized access to internal services on the loopback interface, potentially exposing sensitive information.

Affected Version(s)

stoatchat 0 < 0.15.0

stoatchat 0.15.0

References

https://github.com/stoatchat/stoatchat/security/advisorie...
vendor-advisory
https://www.vulncheck.com/advisories/stoatchat-before-ssr...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

DonAsako
.