CVE-2021-28092: The is-svg package 2.1.0 through 4.2.1 for Node.js uses a regular expression that is vulnerable to Regular Exp

Q: How do I fix CVE-2021-28092?

is-svg: upgrade to newer than 4.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-28092 being exploited?

CVE-2021-28092 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-28092 affect?

CVE-2021-28092 affects is-svg. Severity is high (CVSS 7.5). 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 ve

Q: How urgent is CVE-2021-28092?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-28092 is a high-severity flaw (CVSS 7.5) affecting is-svg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-1333
Published	2021-03-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: is-svg project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-12 22:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

is-svg project is-svg UPGRADE

Affected: >= 2.1.0 and <= 4.2.1

Fixed in: newer than 4.2.1

Safe to downgrade to: a release before 2.1.0

1. Check installed version

npm ls is-svg

2. UPGRADE to newer than 4.2.1

npm install is-svg@">4.2.1"

3. If no update is available yet, DOWNGRADE to a release before 2.1.0

npm view is-svg versions npm install is-svg@"<2.1.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-28092?

is-svg: upgrade to newer than 4.2.1. Exact commands for each OS are on this page.

Is CVE-2021-28092 being exploited?

CVE-2021-28092 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-28092 affect?

CVE-2021-28092 affects is-svg. Severity is high (CVSS 7.5). 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 ve

How urgent is CVE-2021-28092?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2021-29059 HIGH 7.5 UPGRADE A vulnerability was discovered in IS-SVG version 2.1.0 to 4.2.2 and below where a Regular Expression Denial of

References

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