Vulnerability-Lookup

GHSA-3XFM-X84X-QWWQ

Vulnerability from github – Published: 2026-01-15 15:31 – Updated: 2026-04-22 12:30

Details

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

Severity

3.7 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-0989"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-15T15:15:52Z",
    "severity": "LOW"
  },
  "details": "A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested \u003cinclude\u003e directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.",
  "id": "GHSA-3xfm-x84x-qwwq",
  "modified": "2026-04-22T12:30:28Z",
  "published": "2026-01-15T15:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0989"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:7519"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-0989"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429933"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/issues/998"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-0989 (GCVE-0-2026-0989)

Vulnerability from cvelistv5 – Published: 2026-01-15 14:20 – Updated: 2026-09-01 12:10

Title

Libxml2: unbounded relaxng include recursion leading to stack overflow

Summary

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

Severity

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-15 16:31 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1047 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:7519	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-0989	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2429933	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libxml2/-/issues/998

Impacted products

8 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 2.15.2-0.3.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat JBoss Core Services	cpe:/a:redhat:jboss_core_services:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-01-15 00:00

Credits

Red Hat would like to thank lanbigking for reporting this issue.

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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