GHSA-v4f8-2847-rwm7 · Severity: high · Ecosystem: rubygems — Nokogiri Implements libxml2 version vulnerable to use-after-free
There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.
Conclusion & alert: CVE-2021-3518 is rated High Risk (69.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.65%). Core evidence: EPSS rose +3.40% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.25% | 3.65% | +3.40% |
| 2 | 2026-03-16 | 0.23% | 0.25% | +0.02% |
| 3 | 2025-11-21 | — | 0.23% | — |
Full EPSS history (27 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
GHSA-v4f8-2847-rwm7 · Severity: high · Ecosystem: rubygems — Nokogiri Implements libxml2 version vulnerable to use-after-free
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-3518: 2 source package rows (libxml2, libxml2.13); 50 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 11, open 39. | https://security.alpinelinux.org/vuln/CVE-2021-3518 |
debian
|
not yet assigned | CVE-2021-3518 not yet assigned priority: Debian including 1 source packages (libxml2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-3518 |
gentoo
|
low | CVE-2021-3518: 1 GLSA(s) (202107-05), 1 atom(s) (dev-libs/libxml2); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-3518 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-3518 |
suse
|
medium | CVE-2021-3518 severity moderate: SUSE including 423 source package names (0.1.0:libxml2-2-2.9.7-3.34.1, 0.1.75:libxml2-2-2.9.7-3.34.1, …), 653 product×package rows across 216 product lines (Container bci/bci-init, Container bci/dotnet-aspnet, … (216 product lines)): Fixed 621, Known Affected 23, Known Not Affected 9. | https://www.suse.com/security/cve/CVE-2021-3518/ |
ubuntu
|
medium | CVE-2021-3518 medium priority: Ubuntu including 1 source packages (libxml2), 9 status rows across 9 suites (bionic, focal, groovy, hirsute, impish, jammy, trusty, upstream, xenial): released 7, not-affected 2. | https://ubuntu.com/security/CVE-2021-3518 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| xmlsoft | libxml2 | < 2.9.11 | cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| redhat | jboss_core_services | — | cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* |
| netapp | clustered_data_ontap | — | cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* |
| netapp | clustered_data_ontap_antivirus_connector | — | cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:* |
| netapp | manageability_software_development_kit | — | cpe:2.3:a:netapp:manageability_software_development_kit:-:*:*:*:*:*:*:* |
| netapp | ontap_select_deploy_administration_utility | — | cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* |
| netapp | snapdrive | — | cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:windows:*:* |
| netapp | hci_h410c_firmware | — | cpe:2.3:o:netapp:hci_h410c_firmware:-:*:*:*:*:*:*:* |
| oracle | communications_cloud_native_core_network_function_cloud_native_environment | 1.10.0 | cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* |
| oracle | enterprise_manager_base_platform | 13.4.0.0 | cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:* |
| oracle | enterprise_manager_base_platform | 13.5.0.0 | cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.4.0.0 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* |
| oracle | mysql_workbench | <= 8.0.26 | cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.58 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* |
| oracle | real_user_experience_insight | 13.4.1.0 | cpe:2.3:a:oracle:real_user_experience_insight:13.4.1.0:*:*:*:*:*:*:* |
| oracle | real_user_experience_insight | 13.5.1.0 | cpe:2.3:a:oracle:real_user_experience_insight:13.5.1.0:*:*:*:*:*:*:* |