{"id":"CVE-2026-49138","title":"Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private …","summary":"Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private …","severity":"medium","cvss":5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","cwe":["CWE-918"],"vendor":"HKUDS","product":"nanobot","affected":["nanobot < 0.2.1"],"patched":["nanobot-ai 0.2.1"],"published":"2026-06-01","updated":"2026-10-08","sourceUpdated":"2026-10-08T16:17:18.497","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49138","references":[{"url":"https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632","label":"disclosure@vulncheck.com"},{"url":"https://github.com/HKUDS/nanobot/pull/3928","label":"disclosure@vulncheck.com"},{"url":"https://github.com/HKUDS/nanobot/releases/tag/v0.2.1","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following","label":"disclosure@vulncheck.com"},{"url":"https://github.com/HKUDS/nanobot/pull/3928","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49138"},{"url":"https://github.com/HKUDS/nanobot"}],"tags":["nvd","cve.org","exploit-available","osv","pip"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-02T12:23:27.891062Z"},"epss":0.00355,"epssPercentile":0.29074,"aliases":["GHSA-434r-7c99-hwf3"],"ecosystem":"pip","ingestedAt":"2026-07-27T19:08:53.926Z","slug":"CVE-2026-49138","body":"## Overview\n\nNanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the automatic HTTP redirect following behavior in the httpx library to bypass initial URL validation and cause the runtime to send outbound requests to internal hosts before final resolved URL validation is applied.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-49138)\n\nAffected packages:\n\n- `nanobot-ai < 0.2.1`\n\nPatched in:\n\n- `nanobot-ai 0.2.1`\n\nSource: https://osv.dev/vulnerability/GHSA-434r-7c99-hwf3","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":218115,"id":"CVE-2026-49138","ts":1791478398952,"field":"exploit_available","old":"false","new":"true"}]}