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Fencer Vulns
medium 5.5

CVE-2025-26434 json

In libxml2, there is a possible out of bounds read due to a buffer overflow.

published 2025-09-05 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-27009

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

In libxml2, there is a possible out of bounds read due to a buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

Patch / fix

  • libxml2 hummingbird 1 2.15.2-0.3.hum1
  • libxml2-16 hummingbird 1 2.15.2-0.3.hum1
  • python3-libxml2 hummingbird 1 2.15.2-0.3.hum1

red hat advisories RHSA-2026:7519

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-2025-26434 updated cvss 5.5

libxml2: Libxml2 out of bounds read

  • Red Hat Hardened Images libxml2 2.15.2-0.3.hum1, libxml2-16 2.15.2-0.3.hum1, python3-libxml2 2.15.2-0.3.hum1
    fixed: vendor fix RHSA-2026:7519
  • Red Hat Enterprise Linux 6 libxml2, libxml2-python Red Hat Enterprise Linux 7 libxml2, libxml2-python Red Hat Enterprise Linux 8 libxml2, python3-libxml2 Red Hat Enterprise Linux 9 libxml2, python3-libxml2 Red Hat Enterprise Linux 10 libxml2 Red Hat JBoss Core Services libxml2
    +1 more products
    Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    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
no
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.08% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Google Android

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.