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Fencer Vulns
high 7.5

CVE-2021-29059 json

ReDOS in IS-SVG

published 2021-06-21 5 y ago modified 2026-06-17 4 mo ago also GHSA-r8j5-h5cx-65gg , EUVD-2021-2579

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

A vulnerability was discovered in IS-SVG version 2.1.0 to 4.2.2 and below where a Regular Expression Denial of Service (ReDOS) occurs if the application is provided and checks a crafted invalid SVG string.

Patch / fix

  • npm is-svg 4.3.0
  • is-svg_project is-svg 4.3.0

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-2021-29059 updated cvss 7.5

nodejs-is-svg: Regular expression denial of service if the application is provided and checks a crafted invalid SVG string

  • Red Hat OpenShift Service Mesh 1 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix available
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/console-ui-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Decision Manager 7 is-svg
    affected: no fix planned “Out of support scope”
  • 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 planned “Will not fix”
  • Red Hat Process Automation 7 is-svg
    affected: no fix planned “Out of support scope”
  • Red Hat Quay 3 quay/quay-rhel8 Red Hat Virtualization 4 ovirt-web-ui, ovirt-engine-ui-extensions
    affected: no fix planned “Will not fix”
show 3 more
  • 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 Advanced Cluster Management for Kubernetes 2 rhacm2/console-rhel8 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

2.63% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/yetingli/PoCs/blob/main/CVE-2021-29059/IS-SVG.md referenced PoC, tagged "exploit" by a source, unverified

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, <4.3.0
4.3.0

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

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.