CVE-2026-49138
Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jun 1, 2026
- Updated
- Oct 8, 2026
- Reserved
- May 27, 2026
Description
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 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N | VulnCheck |
| 3.1 | 5.0 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
nanobotHKUDS |
|
References
- https://github.com/HKUDS/nanobot/releases/tag/v0.2.1release-notes
- https://github.com/HKUDS/nanobot/pull/3928issue-tracking
- https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632patch
- https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-followingthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.