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TI-2026-27264 Aliases CVE-2026-35063GHSA-mg9q-6j4v-6j49

Missing Authorization in OpenPLC_V3

Priority LOW 39CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

OpenPLC_V3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other user, including administrators, by specifying their user ID or they can create new accounts with role=admin, escalating to full administrator access.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenPLCOpenPLC_V3All versions—No fix listedCNA
  • OpenPLC_V3 VendorOpenPLC Affected All versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:openplcproject:openplc_v3_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableOpenPLC
cpe:2.3:h:openplcproject:openplc_v3:-:*:*:*:*:*:*:*not specified by NVDRunning onOpenPLC
  • cpe:2.3:o:openplcproject:openplc_v3_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·OpenPLC
  • cpe:2.3:h:openplcproject:openplc_v3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·OpenPLC

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35063
  2. 2026-10-03 Alias added: GHSA-mg9q-6j4v-6j49
  3. 2026-10-25 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2024-22495 Stack-based buffer overflow in OpenPLC_v3 CVSS 3.1CRITICAL 9.8
  • TI-2024-26520 Incorrect type conversion in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2024-26519 Incorrect type conversion in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2024-24528 Out-of-bounds read in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2024-24527 Out-of-bounds read in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2026-23850 A path injection vulnerability exists in OpenPLC v3… CVSS 3.1MEDIUM 6.5
See all 11 →

Sources

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