CVE-2026-73058

6.9 mediumEPSS 0.4%

stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowing unauthenticated attackers to bypass protections via the /proxy and /embed endpoints. Attackers can craft requests using IPv6 literal syntax to access services on the loopback interface and retrieve sensitive internal content.

Severity

CVSS 4.0

6.9 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS 3.1

5.8 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
CWE: CWE-918
Published: 2026-08-16
Modified: 2026-08-31
Record from: the NVD, synced 2026-10-19

References

https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4rmr-77qv-hq47
https://www.vulncheck.com/advisories/stoatchat-before-ssrf-via-ipv6-unspecified-address-bypass
https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4rmr-77qv-hq47

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