EUVD-2026-81276
GHSA-mpqf-rmwr-h7wr
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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:X/V:X/RE:X/U:X
Network SSRF, no auth or interaction if the bot ingests untrusted messages; scope changes to the metadata/internal service (S:C, C:H); no integrity or availability impact from a read-only fetch.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
5DescriptionCVE.org
HKUDS nanobot before 0.3.0 contains a server-side request forgery vulnerability in the WebFetchTool component where the _validate_url() function fails to block internal IP ranges and private addresses. Attackers can send messages instructing the bot to fetch cloud metadata endpoints, localhost services, and RFC 1918 addresses to extract IAM credentials and internal service data.
Articles & Coverage 1
AnalysisAI
Server-side request forgery in HKUDS nanobot before 0.3.0 allows remote attackers to force the WebFetchTool component to request arbitrary URLs, including cloud metadata endpoints, localhost services, and RFC 1918 addresses, potentially exfiltrating IAM credentials and internal service data. The flaw resides in the _validate_url() function, which fails to block internal IP ranges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a nanobot instance (version before 0.3.0) whose WebFetchTool is enabled and which processes attacker-supplied messages/URLs; the attacker must be able to submit a message instructing the bot to fetch an arbitrary URL. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N, VC:H, SC:H, score 9.2) describes a network-reachable, low-complexity SSRF requiring no privileges or user interaction, with a scope change into subsequent systems (SC:H) - consistent with reading cloud metadata and internal services. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: version 0.3.0 (per advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, disable the WebFetchTool component if it is not essential to business operations, and restrict network access to the HKUDS nanobot message interface to trusted IP addresses only; if WebFetchTool must remain enabled, deploy a web application firewall configured to block requests to internal IP ranges (RFC 1918, localhost, and cloud metadata endpoints such as 169.254.169.254) and enable egress filtering to prevent outbound connections to internal networks. …
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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