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Fencer Vulns
high 7.5

CVE-2022-23476 json

Unchecked return value from xmlTextReaderExpand in Nokogiri

published 2022-12-08 3 y ago modified 2026-06-17 4 mo ago also GHSA-qv4q-mr5r-qprj , EUVD-2022-7725

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

Nokogiri is an open source XML and HTML library for the Ruby programming language. Nokogiri `1.13.8` and `1.13.9` fail to check the return value from `xmlTextReaderExpand` in the method `Nokogiri::XML::Reader#attribute_hash`. This can lead to a null pointer exception when invalid markup is being parsed. For applications using `XML::Reader` to parse untrusted inputs, this may potentially be a vector for a denial of service attack. Users are advised to upgrade to Nokogiri `>= 1.13.10`. Users may be able to search their code for calls to either `XML::Reader#attributes` or `XML::Reader#attribute_hash` to determine if they are affected.

Patch / fix

  • rubygems nokogiri 1.13.10
  • ruby-nokogiri Debian 14, Debian 13, Debian 12 1.13.10+dfsg-1

debian advisories DEBIAN-CVE-2022-23476

  • rubygem-nokogiri openSUSE Tumbleweed 1.18.9-1.4
  • rubygem-nokogiri openSUSE Tumbleweed 1.18.2-1.1
  • rubygem-nokogiri openSUSE Tumbleweed 1.15.5-1.5
  • ruby3.2-rubygem-nokogiri openSUSE Tumbleweed 1.15.4-1.1

opensuse advisories openSUSE-SU-2026:10356-1openSUSE-SU-2025:14697-1openSUSE-SU-2024:14174-1openSUSE-SU-2024:13440-1

  • ruby-nokogiri Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 1.13.10-r0

alpine advisories ALPINE-CVE-2022-23476

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2022-23476 updated cvss 7.5

rubygem-nokogiri: Denial of service

  • Red Hat Ceph Storage 6 rocksdb
    affected: no fix planned “Will not fix”
  • Red Hat Ceph Storage 7 rocksdb Red Hat Ceph Storage 8 rocksdb Red Hat Ceph Storage 9 rocksdb
    affected: no fix available
  • Red Hat CloudForms Management Engine 5 rubygem-nokogiri Red Hat 3scale API Management Platform 2 3scale-amp2/zync-rhel8, 3scale-amp2/backend-rhel8, 3scale-amp2/toolbox-rhel8 Red Hat Satellite 6 rubygem-nokogiri, tfm-rubygem-nokogiri, rubygem-amazing_print, tfm-rubygem-amazing_print, tfm-ror51-rubygem-nokogiri, tfm-ror52-rubygem-nokogiri
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 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
rubygems nokogiri
>=1.13.8, <1.13.10
1.13.10

Affected products

  • sparklemotion nokogiri

Classification

Weakness

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.