Denial of Service in SheetJS Pro

published 2021-07-19 5y ago modified 2026-09-10 last mo. also GHSA-g973-978j-2c3p , EUVD-2021-1466

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

SheetJS and SheetJS Pro through 0.16.9 allows attackers to cause a denial of service (CPU consumption) via a crafted .xlsx document that is mishandled when read by xlsx.js.

Patch / fix

fixed in 3 links 1

npm xlsx 0.17.0
maven org.webjars.npm:xlsx 0.17.0
oracle rest_data_services 21.2.4

oracle.com/security-alerts/cpujan2022.html advisory

Is CVE-2021-32014 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	xlsx	<0.17.0	0.17.0
maven	org.webjars.npm:xlsx	<0.17.0	0.17.0

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption
CWE-345 Insufficient Verification of Data Authenticity

References

oracle.com /security-alerts/cpujan2022.html
web, patch, third-party-advisory
sheetjs.com /pro
web, product, vendor-advisory
floqast.com /engineering-blog/post/fuzzing-and-parsing-securely/
third-party-advisory
npmjs.com /package/xlsx/v/0.17.0
web, product, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-32014
advisory
floqast.com /engineering-blog/post/fuzzing-and-parsing-securely
web

Sources

Fencer Intel 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.