Apache Guacamole at a glance
- Last 12 months
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| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
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| Jul 2026 | 0 | 0 |
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| Dec 2024 | 0 | 0 |
8 results · Feed
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Medium 6.8
Apache Guacamole: Improper input validation of console codes
The terminal emulator of Apache Guacamole 1.5.5 and older does not properly validate console codes received from servers via text-based protocols like SSH. If a malicious user has access to a text-based connection, a specially-crafted sequence of console code…
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None 0.0
Apache Guacamole: Integer overflow in handling of VNC image buffers
Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, poss…
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Medium 6.8
Apache Guacamole: Use-after-free in handling of RDP audio input buffer
Apache Guacamole 0.9.10 through 1.5.1 may continue to reference a freed RDP audio input buffer. Depending on timing, this may allow an attacker to execute arbitrary code with the privileges of the guacd process.
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Medium 6.5
Apache Guacamole: Incorrect calculation of Guacamole protocol element lengths
Apache Guacamole 1.5.1 and older may incorrectly calculate the lengths of instruction elements sent during the Guacamole protocol handshake, potentially allowing an attacker to inject Guacamole instructions during the handshake through specially-crafted data.
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Unscored —
Improper validation of SAML responses
Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.
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Unscored —
Private tunnel identifier may be included in the non-private details of active connections
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 …
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High 7.5
Missing Encryption of Sensitive Data in Apache Guacamole
Prior to 1.0.0, Apache Guacamole used a cookie for client-side storage of the user's session token. This cookie lacked the "secure" flag, which could allow an attacker eavesdropping on the network to intercept the user's session token if unencrypted HTTP requ…
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High 8.1
Apache Guacamole Race Condition vulnerability
A race condition in Guacamole's terminal emulator in versions 0.9.5 through 0.9.10-incubating could allow writes of blocks of printed data to overlap. Such overlapping writes could cause packet data to be misread as the packet length, resulting in the remaini…