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Fencer Vulns
high 7.5

CVE-2021-28092 json

Regular Expression Denial of Service (ReDoS)

published 2021-03-12 5 y ago modified 2026-06-17 4 mo ago also GHSA-7r28-3m3f-r2pr , EUVD-2021-0627

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm is-svg 4.2.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-28092 updated cvss 7.5

nodejs-is-svg: ReDoS via malicious string

  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/console-rhel8, rhacm2/search-ui-rhel8, rhacm2/console-ui-rhel8
    affected: no fix available
  • Red Hat OpenShift Container Platform 3.11 kibana
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4 kibana, openshift4/ose-grafana
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4.8 openshift4/ose-thanos-rhel8 v4.8.0-202106291913.p0.git.c358e96.assembly.stream
    fixed: vendor fix RHSA-2021:2438
  • Red Hat OpenShift Container Platform 4.9 openshift4/ose-prometheus v4.9.0-202109302016.p0.git.3197fa7.assembly.stream
    fixed: vendor fix RHSA-2021:3759
  • Red Hat OpenShift Container Platform 4.8 openshift4/ose-cli v4.8.0-202106291725.p0.git.1077b05.assembly.stream, openshift4/ose-pod v4.8.0-202107161820.p0.git.051ac4f.assembly.stream, openshift4/ose-etcd v4.8.0-202106152230.p0.git.aefa6bf.assembly.stream, openshift4/ose-tests v4.8.0-202107131424.p0.git.0d958c3.assembly.stream, openshift4/ose-console v4.8.0-202107010336.p0.git.188a490.assembly.stream, openshift4/ose-coredns v4.8.0-202106291913.p0.git.642b46e.assembly.stream, +135 more Red Hat OpenShift Container Platform 4.9 openshift4/ose-cli v4.9.0-202109302317.p0.git.96e95ce.assembly.stream, openshift4/ose-pod v4.9.0-202110080828.p0.git.894a78b.assembly.stream, openshift4/ose-etcd v4.9.0-202109302317.p0.git.5c1feaf.assembly.stream, openshift4/ose-console v4.9.0-202110130449.p0.git.8c077e4.assembly.rc.8, openshift4/ose-tests v4.9.0-202110011028.p0.git.6105395.assembly.stream, openshift4/ose-coredns v4.9.0-202109302317.p0.git.3cb11c0.assembly.stream, +141 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.03% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
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 is-svg
>=2.1.0, <4.2.2
4.2.2

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity
  • CWE-400 Uncontrolled Resource Consumption

References

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.