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TI-2026-79544 Aliases CVE-2026-86019

Attachment size limit bypass in Part-DB via API base64 upload

Priority MEDIUM 57CWE-400Published · 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-400.

Summary

Part-DB-server before 2.13.2 lets authenticated API users bypass the configured maximum attachment file size. The API base64 upload path skips the size validation that browser uploads enforce (CWE-770). An authenticated user with API access and permission to create attachments can upload files larger than the limit, potentially exhausting disk space and causing a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

Part-DB is an open source inventory management system for electronic components. Prior to version 2.13.2, Part-DB allows authenticated API users to bypass the configured maximum attachment file size by uploading attachments through the API using base64-encoded file data. The application enforces the configured attachment size limit for normal browser-based file uploads, but the API base64 upload path does not apply the same size validation. As a result, an authenticated user with API access and permission to create attachments can upload files larger than the configured maximum attachment size, potentially exhausting disk space and causing a denial of service. This issue has been patched in version 2.13.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00371 31st percentileScored 2026-11-07
Fix Fixed Part-DB-server (Part-DB): 2.13.2

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
Part-DBPart-DB-serverbefore 2.13.22.13.2Patch availableCNA
  • Part-DB-server VendorPart-DB Affected before 2.13.2 Fixed in 2.13.2 Patch available CNA

Remediation

Update Part-DB-server to version 2.13.2, which patches this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Part-DB-server (Part-DB) Fixed in 2.13.2

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-86019
  2. 2026-10-30 CISA SSVC decision points changed
  3. 2026-10-30 Priority changed: LOW → MEDIUM

References

Other 2

  • TI-2026-79546 Password reset link poisoning in Part-DB allows account takeover CVSS 4.0HIGH 8.7
  • TI-2019-15485 Part-DB 0.4 Authentication Bypass via login.php CVSS 4.0HIGH 8.8
  • TI-2026-79538 Part-DB attachment upload allows PHP execution via .phar files CVSS 3.1CRITICAL 9.6
  • TI-2022-00754 OS Command Injection in part-db/part-db CVSS 3.1CRITICAL 9.8
  • TI-2026-79539 Hardcoded APP_SECRET in Part-DB enables forged login cookies CVSS 3.1MEDIUM 6.3
  • TI-2026-79540 Stored HTML injection in Part-DB BOM validation results CVSS 4.0MEDIUM 5.7
See all 12 →

Sources

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