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TI-2026-36354 Aliases CVE-2026-49140GHSA-4rm2-fq3x-g7x7

Nanobot < 0.2.1 Denial of Service via Matrix Media Download Handler

Priority MEDIUM 57CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Nanobot prior to version 0.2.1 contains a denial of service vulnerability in the Matrix channel media download handler that allows authenticated room members to exhaust process memory and bandwidth by sending media events with missing or invalid size metadata. Attackers can send multiple concurrent Matrix media events with omitted or invalid declared sizes to trigger simultaneous large media downloads that fully materialize response bodies before post-download rejection, consuming process resources until service degradation occurs.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00268 19th percentileScored 2026-11-07
Fix Fixed nanobot (HKUDS): 0.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HKUDSnanobotbefore 0.2.10.2.1Patch availableCNA
  • nanobot VendorHKUDS Affected before 0.2.1 Fixed in 0.2.1 Patch available CNA

Remediation

  • Fix · CNA nanobot (HKUDS) Fixed in 0.2.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    HKUDS nanobot 0.2.1

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-36352 Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect FollowingPriority MEDIUM 57
    • TI-2026-36353 Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl PoisoningPriority LOW 31
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49140
  2. 2026-10-03 Alias added: GHSA-4rm2-fq3x-g7x7

References

Patch 2

Other 1

  • TI-2026-44237 LightRAG: Missing Authentication for Critical API Functions in Default Configuration CVSS 3.1CRITICAL 9.8
  • TI-2026-78721 Missing authentication in HKUDS Vibe-Trading FastAPI server enables RCE CVSS 4.0CRITICAL 9.3
  • TI-2026-44184 Improper authentication in HKUDS LightRAG CVSS 4.0CRITICAL 9.3
  • TI-2026-26034 Zero-Click Indirect Prompt Injection and Authentication Bypass via Email Polling CVSS 4.0HIGH 8.9
  • TI-2026-62432 HKUDS nanobot before 0.3.0 Server-Side Request Forgery via WebFetchTool CVSS 4.0CRITICAL 9.2
  • TI-2026-25310 DeepCode 1.2.0 Path Traversal via SPA Catch-All Route in main.py CVSS 4.0HIGH 8.7
See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences