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

published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also BIT-guacamole-2021-41767 , BIT-guacamole-server-2021-41767 , EUVD-2021-28775

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

bitnami guacamole 1.3.0
bitnami guacamole-server 1.3.0

Exploit prediction

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N
OSV	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	guacamole	<1.3.0	1.3.0
bitnami	guacamole-server	<1.3.0	1.3.0

Affected products

Apache Software Foundation Apache Guacamole

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

lists.apache.org /thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro
mailing-list, vendor-advisory, web
openwall.com /lists/oss-security/2022/01/11/6
mailing-list, third-party-advisory, web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary