CVE-2025-49794

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2025-06-16. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
47.9%
KEV
Not listed

Published

June 16, 2025

Last Modified

July 19, 2026

Advisory Details (10)

Auto-updated May 12, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 7 Extended Lifecycle Support.

https://access.redhat.com/errata/RHSA-2025:12240
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2025:12239
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.2 Advanced Update Support.

https://access.redhat.com/errata/RHSA-2025:12237
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12199
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12099
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP So

https://access.redhat.com/errata/RHSA-2025:12098
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:11580
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:10699
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:10698
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2025:10630

Vendor Advisories for CVE-2025-49794(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(27)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython-libxml2 (2.9.3+dfsg1-1ubuntu0.7+esm9) @ xenial2026-05-21ubuntu
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat
redhatopenshift-serverless-1/logic-swf-devmode-rhel8:1.36.0-72026-01-22redhat
redhatcompliance/openshift-file-integrity-rhel8-operator:v1.32025-11-21redhat
redhatrhcos-412.86.202510291903-02025-11-13redhat
redhatrhcos-414.92.202510211419-02025-10-30redhat
redhatrhcos-418.94.202510230424-02025-10-29redhat
redhatlibxml22025-10-27redhat
redhatrhcos-413.92.202510150118-02025-10-23redhat
redhatrhcos-4.19.9.6.202510140714-02025-10-22redhat
redhatrhcos-417.94.202510112152-02025-10-22redhat
redhatrhcos-4.20.9.6.202509251656-02025-10-21redhat
redhatcert-manager/jetstack-cert-manager-rhel9:v1.16.5-17605157572025-10-16redhat
redhatweb-terminal/web-terminal-tooling-rhel9:1.11-82025-09-15redhat
redhatweb-terminal/web-terminal-tooling-rhel9:1.12-42025-09-15redhat
redhatinsights-proxy/insights-proxy-container-rhel9:1.5.5-17545043432025-08-07redhat
redhatlibxml2-0:2.9.7-9.el8_4.62025-07-30redhat
redhatlibxml2-0:2.9.7-9.el8_2.32025-07-30redhat
redhatlibxml2-0:2.9.7-16.el8_8.92025-07-30redhat
redhatlibxml2-0:2.9.1-6.el7_9.102025-07-30redhat
redhatlibxml2-0:2.9.7-13.el8_6.102025-07-29redhat
redhatlibxml2-0:2.9.13-3.el9_2.72025-07-29redhat
redhatlibxml2-0:2.9.13-1.el9_0.52025-07-29redhat
redhatlibxml2-0:2.9.13-10.el9_42025-07-23redhat
redhatlibxml2-0:2.9.7-21.el8_10.12025-07-09redhat
redhatlibxml2-0:2.9.13-10.el9_62025-07-09redhat
redhatlibxml2-0:2.12.5-7.el10_02025-07-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-07-21 15:24 UTCEPSS rescore
  2. 2026-07-20 17:07 UTCEPSS rescore
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  20. 2026-07-10 11:28 UTCOSV refresh
  21. 2026-07-09 19:09 UTCEPSS rescore
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  6. 2026-07-02 17:01 UTCEPSS rescore
  7. 2026-07-01 15:06 UTCEPSS rescore
  8. 2026-06-30 23:22 UTCEPSS rescore
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  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-21 21:12 UTCOSV refresh
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
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  30. 2026-06-19 19:25 UTCEPSS rescore
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  44. 2026-06-10 22:18 UTCEPSS rescore
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  49. 2026-06-07 15:24 UTCEPSS rescore
  50. 2026-06-06 13:47 UTCEPSS rescore
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  58. 2026-06-03 04:10 UTCOSV refresh
  59. 2026-06-02 20:12 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-49794?
CVE-2025-49794 is a critical vulnerability published on June 16, 2025. A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml,…
When was CVE-2025-49794 disclosed?
CVE-2025-49794 was first published in the National Vulnerability Database on June 16, 2025, with the most recent update on July 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-49794 actively exploited?
CVE-2025-49794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-49794?
CVE-2025-49794 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2025-49794?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-49794, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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