CVE-2026-63088

stoatchat before 0.14.0 contains a server-side request forgery (SSRF) vulnerability that allows unauthenticated network-accessible attackers to bypass the DNS-based IP blocklist by exploiting incomplete address validation in the url_is_blacklisted function, which inspects only the first resolved address while the underlying HTTP client iterates all cached addresses.

CVSS 4.0

7.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS 3.1

8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2026-07-16

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

References

• https://github.com/stoatchat/stoatchat/releases/tag/v0.14.0
• https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q
• https://github.com/stoatchat/stoatchat/security/advisories/GHSA-xhww-5g9p-vvq5
• https://www.vulncheck.com/advisories/stoatchat-ssrf-via-dns-based-ip-blocklist-bypass
• https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q

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