What’s Vulnerable › Vulnerabilities

CVE-2021-28092: Regular Expression Denial of Service (ReDoS)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-12 · updated 2026-06-17
• Weakness: CWE-1333

Description

The is-svg package 2.1.0 through 4.2.1 for Node.js uses a regular expression that is vulnerable to Regular Expression Denial of Service (ReDoS). If an attacker provides a malicious string, is-svg will get stuck processing the input for a very long time.

Affected products

• Is-Svg Project Is-Svg: from 2.1.0 through 4.2.1
• Npm Is-Svg: from 2.1.0 before 4.2.2 — fixed in 4.2.2

How to fix

Upgrade to a fixed version: Npm Is-Svg 4.2.2. Check the vendor advisory for mitigations.

References

• https://github.com/sindresorhus/is-svg/releases
• https://github.com/sindresorhus/is-svg/releases/tag/v4.2.2
• https://security.netapp.com/advisory/ntap-20210513-0008/
• https://www.npmjs.com/package/is-svg
• https://github.com/sindresorhus/is-svg/releases
• https://github.com/sindresorhus/is-svg/releases/tag/v4.2.2
• https://security.netapp.com/advisory/ntap-20210513-0008/
• https://www.npmjs.com/package/is-svg

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