SheetJS Regular Expression Denial of Service (ReDoS)

published 2024-04-05 2 y ago modified 2026-09-10 1 mo ago also GHSA-5pgg-2g8v-p4x9 , EUVD-2024-1106

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

SheetJS Community Edition before 0.20.2 is vulnerable.to Regular Expression Denial of Service (ReDoS).

Patch / fix

fixed in 1

sheetjs community_edition 0.20.2

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-04-05)

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	xlsx	all versions	no fix listed

Affected products

sheetjs community_edition

Classification

Weakness

CWE-1333 Inefficient Regular Expression Complexity

References

cwe.mitre.org /data/definitions/1333.html
web
git.sheetjs.com /sheetjs/sheetjs/src/tag/v0.20.2
web
cdn.sheetjs.com /advisories/CVE-2024-22363
web
nvd.nist.gov /vuln/detail/CVE-2024-22363
advisory
cdn.sheetjs.com
web
git.sheetjs.com /sheetjs/sheetjs
package

Sources

Fencer Vulns 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.

Summary