CVE-2024-22363Network attack vector

Service interruption via inefficient regular expression

Published Apr 5, 2024 · Updated Aug 26, 2024

Regular expression denial of service in SheetJS Community Edition 0.20.1 and earlier allows remote attackers to interrupt service. The affected parsing methods apply inefficient regular expressions to untrusted spreadsheet data, causing excessive CPU use; the exact parsers and patterns are undisclosed. Exploitation requires a host application to pass attacker-controlled spreadsheet content to the library, and the bounded consequence is service interruption.

CVSS severity7.5
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in SheetJS Community Edition 0.20.1 and earlier allows remote attackers to interrupt service. The affected parsing methods apply inefficient regular expressions to untrusted spreadsheet data, causing excessive CPU use; the exact parsers and patterns are undisclosed. Exploitation requires a host application to pass attacker-controlled spreadsheet content to the library, and the bounded consequence is service interruption.

The record

CVE
CVE-2024-22363
Published
Apr 5, 2024
Updated
Aug 26, 2024
Vendor
SheetJS
Product
SheetJS Community Edition
Classifications
CWE-1333, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <0.20.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SheetJS · SheetJS Community Editionversion=0 <0.20.2

Published CVSS scores

7.5SheetJSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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