7.5

CVE-2026-57434: nokogiri NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-57434DEBIAN-CVE-2026-57434GHSA-9cv2-cfxc-v4v2
Published 25-06-2026Last modified 25-06-2026
Open JSON

Vulnerability summary

CVE-2026-57434 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in nokogiri. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 25-06-2026
    Last modifiedVulnerability information updated.

Description

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • ruby-nokogiriAll versions (No fix recorded) | < 1.19.4+dfsg-1
Nokogiri1 product
RubyGems1 product
  • nokogiri< 1.19.4
Sparklemotion1 product
Ubuntu1 product
  • ruby-nokogiriAll versions (No fix recorded)

5 vendors · 5 products

References

6 links