Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2019-5477

33
FAUCET Score

CVE-2019-5477 is a critical command injection vulnerability in Nokogiri v1.10.3 and earlier, affecting various Linux distributions and Nokogiri itself. It allows remote attackers to execute arbitrary commands by providing malicious input to the undocumented Nokogiri::CSS::Tokenizer#load_file method. With a CVSS score of 9.8 (Critical), this vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.10.3CPE matchmatch criteria
cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
19.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
19.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.90%
Probability of exploitation in next 30 days
EPSS Percentile
92.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0590 is in the 87th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: nokogiriFixed in: 1.10.4
rubygemspatch availablevia ghsa
Product: rexicalFixed in: 1.0.7

Vendor Advisories (1)

rubygemsGHSA-cr5j-953j-xw5pcritical

Nokogiri Command Injection Vulnerability

Aug 19, 2019

References

github.com / sparklemotion/nokogiri/issues/1915
PatchThird Party Advisory
github.com / tenderlove/rexical/blob/master/CHANGELOG.rdoc
Release Notes
hackerone.com / reports/650835
Permissions Required
lists.debian.org / debian-lts-announce/2019/09/msg00027.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2022/10/msg00018.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2022/10/msg00019.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202006-05
Third Party Advisory
usn.ubuntu.com / 4175-1
Third Party Advisory