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CVE-2026-0989

19
FAUCET Score

CVE-2026-0989 describes a denial-of-service vulnerability in the libxml2 RelaxNG parser. This flaw arises from a lack of depth enforcement when resolving nested schema inclusions, allowing specially crafted or overly complex schemas to trigger excessive recursion, leading to application crashes. The vulnerability has a low CVSS score of 3.7, indicating a low impact (denial of service) with high attack complexity, requiring no user interaction or privileges. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.15.2CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
35.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 23rd percentile among its peer group of 1,506 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (11)

microsoftpatch availablevia msrc
Product: azl3 libxml2 2.11.5-9 on Azure Linux 3.0Fixed in: 2.11.5-10
microsoftpatch availablevia msrc
Product: azl3 libxml2 2.11.5-10 on Azure Linux 3.0Fixed in: 2.11.5-10
microsoftpatch availablevia msrc
Product: 20960-17084Fixed in: 2.11.5-10
microsoftpatch availablevia msrc
Product: 21495-17084Fixed in: 2.11.5-10
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: libxml2
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: libxml2
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: rhcos
redhatvendor investigatingvia redhat_api
Product: Red Hat JBoss Core ServicesFixed in: libxml2
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libxml2
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libxml2

Vendor Advisories (2)

redhatCVE-2026-0989Low

libxml2: Unbounded RelaxNG Include Recursion Leading to Stack Overflow

Jan 15, 2026
microsoft2026-Jan/CVE-2026-0989Low

Libxml2: unbounded relaxng include recursion leading to stack overflow

Jan 13, 2026

References

access.redhat.com / errata/RHSA-2026:7519
Third Party Advisory
access.redhat.com / security/cve/CVE-2026-0989
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
gitlab.gnome.org / GNOME/libxml2/-/issues/998
ExploitIssue TrackingMitigationThird Party Advisory