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TI-2021-18412 Aliases CVE-2021-41767GHSA-8jvg-8759-x9j6

Private tunnel identifier may be included in the non-private details of active connections

Priority LOW 33CWE-200Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.

Why it matters now

EPSS 0.01997 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Guacamoleup to 1.3.0—No fix listedCNA
  • Apache Guacamole VendorApache Affected up to 1.3.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:guacamole:*:*:*:*:*:*:*:*up to 1.3.0VulnerableApache
  • cpe:2.3:a:apache:guacamole:*:*:*:*:*:*:*:* Versions up to 1.3.0 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41767
  2. 2026-10-03 Alias added: GHSA-8jvg-8759-x9j6

References

Advisory 2

  • TI-2019-14123 SQLite 3.30.1 mishandles certain SELECT statements with a nonexistent VIEW, leading to an application crash. CVSS 3.1HIGH 7.5
  • TI-2023-23512 Apache Guacamole: Integer overflow in handling of VNC image buffers CVSS 3.1HIGH 8.8
  • TI-2021-19751 Improper validation of SAML responses CVSS 3.1HIGH 8.8
  • TI-2023-14404 Apache Guacamole: Use-after-free in handling of RDP audio input buffer CVSS 3.1HIGH 8.1
  • TI-2017-02374 Race condition in Apache Guacamole CVSS 3.0HIGH 8.1
  • TI-2018-01241 Prior to 1.0.0, Apache Guacamole used a cookie for client-side storage of the user's… CVSS 3.0HIGH 7.5
See all 12 →

Sources

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