Vulnerability record · CVE-2026-63088 · published 16 July 2026

CVE-2026-63088: Server-side request forgery (SSRF) vulnerability

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.

7.7 CVSS 4.0 High EPSS 0.51% · top 59.2% CWE-918 · Server-side request forgery (SSRF) Deferred

7.7CVSS 4.0 base score

0.51%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

16 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
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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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-63088), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.