CVE-2024-32477Public exploit

Permission bypass via terminal-response input race

Published Apr 18, 2024 · Updated Aug 2, 2024

Permission prompt bypass in Deno before 1.42.2 allows local users to execute actions outside the runtime permission policy. The prompter flushes standard input before reading a decision, but delayed ANSI replies from a VTE terminal can arrive afterward and inject an affirmative byte. A malicious Deno program must run in an interactive VTE-based terminal, and the user must press Enter after the payload triggers.

CVSS severity7.4
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permission prompt bypass in Deno before 1.42.2 allows local users to execute actions outside the runtime permission policy. The prompter flushes standard input before reading a decision, but delayed ANSI replies from a VTE terminal can arrive afterward and inject an affirmative byte. A malicious Deno program must run in an interactive VTE-based terminal, and the user must press Enter after the payload triggers.

The record

CVE
CVE-2024-32477
Published
Apr 18, 2024
Updated
Aug 2, 2024
Vendor
Deno Land Inc.
Product
Deno
Classifications
CWE-362, CWE-78, T1059.007
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.42.2
  2. Affected versionversion=1.42.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Deno Land Inc. · Denoversion=< 1.42.2; version=1.42.2

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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