CVE-2021-32773

Confused deputy attack in sandbox module resolution

HIGH
7.5
CVSS Score
Published: July 19, 2021 at 11:55 PM UTC
Updated: June 17, 2026 at 03:53 AM UTC
1 product affected across 1 vendorRacket

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%

Description

Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the `handin-server` system, it is not possible to work around this problem and upgrading is required.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.2
Affected range stops below 8.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-441CWE-610

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