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CVE-2026-92576· NVD / CVE Program· CNA VulnCheck

HKUDS nanobot before 0.3.0 Server-Side Request Forgery via WebFetchTool

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.

CriticalCVSS 9.2 · v4.0—No exploit Fix available
Published
Sep 16, 2026
Updated
Sep 17, 2026
EPSS
0.4% · 36th percentile
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Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
9.2
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • HKUDS nanobot

    • 0.3.0not affected
    • before 0.3.0affected · semver

Same product

hkuds: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-2577Nanobot Unauthenticated WhatsApp Session Hijack via WebSocket Bridge
    40Plan
  • CVE-2026-48716nanobot: Path traversal via unsanitized WhatsApp document fileName enables arbitrary file write
    34Monitor
  • CVE-2026-49139Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning
    28Monitor
  • CVE-2026-90809HKUDS nanobot ExecTool shell.py ExecTool._spawn argument injection
    27Monitor
  • CVE-2026-90808HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist
    21Monitor
  • CVE-2026-49140Nanobot < 0.2.1 Denial of Service via Matrix Media Download Handler
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
HKUDS nanobot0.3.0Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-49139107 days apartNanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning
    28Monitor
  • CVE-2026-49138107 days apartNanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following
    21Monitor
  • CVE-2026-1924640 days apartHKUDS nanobot Provider-returned Image URL image_generation.py _download_image_data_url server-side request forgery
    8Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-918 · Server-Side Request Forgery (SSRF)

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records