libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use…
Priority LOW 37CWE-776Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02006 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 10 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* | before 2.6.2 | Vulnerable | libexpat project |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* | 39 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* | 40 | Vulnerable | Fedoraproject |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:* | 9 | Vulnerable | NetApp |
| cpe:2.3:a:netapp:ontap_tools:10:*:*:*:*:vmware_vsphere:*:* | 10 | Vulnerable | NetApp |
| cpe:2.3:a:netapp:windows_host_utilities:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* Versions before 2.6.2 Vulnerable ·libexpat project
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* Versions 39 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* Versions 40 Vulnerable ·Fedoraproject
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:* Versions 9 Vulnerable ·NetApp
- cpe:2.3:a:netapp:ontap_tools:10:*:*:*:*:vmware_vsphere:*:* Versions 10 Vulnerable ·NetApp
- cpe:2.3:a:netapp:windows_host_utilities:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h610c_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h610c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h610c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h610c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Remediation
Red Hat 10 advisories
- RHSA-2026:7243 Released 2026-04-16 · Red Hat rating ImportantOpenShift Container Platform 4.19.28 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202604080618-0, rhcos-ppc64le-4.19.9.6.202604080618-0, rhcos-s390x-4.19.9.6.202604080618-0 +1
- RHSA-2026:7239 Released 2026-04-16 · Red Hat rating ImportantOpenShift Container Platform 4.13.65 bug fix and security update
- Red Hat OpenShift Container Platform 4.13 rhcos-x86_64-413.92.202604080111-0
- RHSA-2026:5087 Released 2026-03-26 · Red Hat rating ModerateOpenShift Container Platform 4.14.63 bug fix and security update
- Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202603110216-0, rhcos-ppc64le-414.92.202603110216-0, rhcos-s390x-414.92.202603110216-0 +1
Show 7 more Red Hat advisories
- RHSA-2026:4480 Released 2026-03-19 · Red Hat rating ModerateOpenShift Container Platform 4.17.51 bug fix and security update
- Red Hat OpenShift Container Platform 4.17 rhcos-aarch64-417.94.202603102246-0, rhcos-ppc64le-417.94.202603102246-0, rhcos-s390x-417.94.202603102246-0 +1
- RHSA-2026:4465 Released 2026-03-19 · Red Hat rating ImportantOpenShift Container Platform 4.16.58 bug fix and security update
- Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202603112010-0, rhcos-ppc64le-416.94.202603112010-0, rhcos-s390x-416.94.202603112010-0 +1
- RHSA-2026:4419 Released 2026-03-19 · Red Hat rating ImportantOpenShift Container Platform 4.15.62 bug fix and security update
- Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202603101737-0, rhcos-ppc64le-415.92.202603101737-0, rhcos-s390x-415.92.202603101737-0 +1
- RHSA-2026:3876 Released 2026-03-11 · Red Hat rating ModerateOpenShift Container Platform 4.18.35 bug fix and security update
- Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202603021444-0, rhcos-ppc64le-418.94.202603021444-0, rhcos-s390x-418.94.202603021444-0 +1
- RHSA-2025:21776 Released 2025-11-19 · Red Hat rating Importantexpat security update
- Red Hat Enterprise Linux BaseOS (v. 8) expat-2.5.0-1.el8_10, expat-devel-2.5.0-1.el8_10
- RHSA-2024:3926 Released 2024-06-13 · Red Hat rating Moderateexpat security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) expat-devel-2.5.0-1.el9_2.1
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) expat-2.5.0-1.el9_2.1
- RHSA-2024:1530 Released 2024-03-26 · Red Hat rating Moderateexpat security update
- Red Hat Enterprise Linux AppStream (v. 9) expat-devel-2.5.0-1.el9_3.1
- Red Hat Enterprise Linux BaseOS (v. 9) expat-2.5.0-1.el9_3.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:1530 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:3926 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:21776 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:1530 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:3926 |
| Red Hat OpenShift Container Platform 4.13 | Fixed | RHSA-2026:7239 |
| Red Hat OpenShift Container Platform 4.14 | Fixed | RHSA-2026:5087 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | RHSA-2026:4419 |
| Red Hat OpenShift Container Platform 4.16 | Fixed | RHSA-2026:4465 |
| Red Hat OpenShift Container Platform 4.17 | Fixed | RHSA-2026:4480 |
| Red Hat OpenShift Container Platform 4.18 | Fixed | RHSA-2026:3876 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:7243 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2024-28757
- 2026-10-03 Alias added: GHSA-ch5v-h69f-mxc8
References
Patch 2
Sources
- CVE-2024-28757 · CVE Program
- CVE-2024-28757 · NVD
- FIRST EPSS
- GHSA-ch5v-h69f-mxc8 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-28757 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences