CVE-2026-6732

HIGHNVD 7.56.5▼
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-04-24. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.

CVSS v3
7.5
EG Score
6.5(medium)
EPSS
46.3%
KEV
Not listed

Published

April 23, 2026

Last Modified

June 30, 2026

Advisory Details (5)

Auto-updated Apr 30, 2026
Patch available. Sources: redhat.
generic

Fix type confusion crash in xmlParseReference under XSD validation (!411) · Merge requests · GNOME / libxml2 · GitLab

https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411
generic

Entity expansion crashes XSD streaming validation (type confusion in xmlParseReference) (#1097) · Issues · GNOME / libxml2 · GitLab

https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097
redhat

2461300 – (CVE-2026-6732) CVE-2026-6732 libxml2: libxml2: Denial of Service via crafted XSD-validated document

https://bugzilla.redhat.com/show_bug.cgi?id=2461300
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-6732
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11503

Vendor Advisories for CVE-2026-6732(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibxml2-main-2.15.3-0.1.hum12026-04-29redhat

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.

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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 111 total refreshes for this CVE.

  1. 2026-07-21 15:25 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 23:38 UTCOSV refresh
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-13 22:31 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-13 06:13 UTCEPSS rescore
  14. 2026-07-12 05:46 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-11 08:27 UTCEPSS rescore
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 19:10 UTCEPSS rescore
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-08 15:16 UTCEPSS rescore
  21. 2026-07-07 13:46 UTCEPSS rescore
  22. 2026-07-07 13:46 UTCEPSS rescore
  23. 2026-07-06 16:27 UTCEPSS rescore
  24. 2026-07-06 16:27 UTCEPSS rescore
  25. 2026-07-06 02:23 UTCEPSS rescore
Show 75 more
  1. 2026-07-06 02:23 UTCEPSS rescore
  2. 2026-07-05 02:31 UTCEPSS rescore
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-04 06:31 UTCEPSS rescore
  5. 2026-07-04 06:31 UTCEPSS rescore
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-30 20:33 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-27 03:08 UTCEPSS rescore
  13. 2026-06-25 13:50 UTCEPSS rescore
  14. 2026-06-24 14:05 UTCEPSS rescore
  15. 2026-06-23 21:33 UTCEPSS rescore
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-21 14:56 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 01:59 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-19 19:26 UTCEPSS rescore
  24. 2026-06-19 19:26 UTCEPSS rescore
  25. 2026-06-18 17:52 UTCEPSS rescore
  26. 2026-06-18 17:52 UTCEPSS rescore
  27. 2026-06-17 17:53 UTCEPSS rescore
  28. 2026-06-16 17:53 UTCEPSS rescore
  29. 2026-06-15 17:49 UTCEPSS rescore
  30. 2026-06-15 17:49 UTCEPSS rescore
  31. 2026-06-14 23:18 UTCEPSS rescore
  32. 2026-06-14 12:14 UTCVendor advisory
  33. 2026-06-14 12:14 UTCGHSA enrichment
  34. 2026-06-13 23:00 UTCEPSS rescore
  35. 2026-06-12 23:12 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-11 14:21 UTCVendor advisory
  38. 2026-06-11 14:21 UTCGHSA enrichment
  39. 2026-06-11 14:00 UTCEPSS rescore
  40. 2026-06-10 22:19 UTCEPSS rescore
  41. 2026-06-10 13:22 UTCEPSS rescore
  42. 2026-06-10 09:37 UTCVendor advisory
  43. 2026-06-10 09:37 UTCGHSA enrichment
  44. 2026-06-09 07:21 UTCVendor advisory
  45. 2026-06-09 07:21 UTCGHSA enrichment
  46. 2026-06-08 14:17 UTCEPSS rescore
  47. 2026-06-08 04:26 UTCVendor advisory
  48. 2026-06-08 04:26 UTCGHSA enrichment
  49. 2026-06-07 15:25 UTCEPSS rescore
  50. 2026-06-07 02:10 UTCVendor advisory
  51. 2026-06-07 02:10 UTCGHSA enrichment
  52. 2026-06-06 13:47 UTCEPSS rescore
  53. 2026-06-05 23:53 UTCVendor advisory
  54. 2026-06-05 23:53 UTCGHSA enrichment
  55. 2026-06-05 22:47 UTCEPSS rescore
  56. 2026-06-05 06:10 UTCEPSS rescore
  57. 2026-06-04 21:02 UTCVendor advisory
  58. 2026-06-04 21:02 UTCGHSA enrichment
  59. 2026-06-04 13:12 UTCEPSS rescore
  60. 2026-06-03 18:43 UTCVendor advisory
  61. 2026-06-03 18:43 UTCGHSA enrichment
  62. 2026-06-02 20:13 UTCEPSS rescore
  63. 2026-06-02 16:25 UTCVendor advisory
  64. 2026-06-02 16:25 UTCGHSA enrichment
  65. 2026-06-01 14:08 UTCVendor advisory
  66. 2026-06-01 14:08 UTCGHSA enrichment
  67. 2026-06-01 13:52 UTCEPSS rescore
  68. 2026-06-01 13:52 UTCEPSS rescore
  69. 2026-05-31 22:30 UTCEPSS rescore
  70. 2026-05-31 22:30 UTCEPSS rescore
  71. 2026-05-31 00:16 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-29 13:44 UTCEPSS rescore
  74. 2026-05-29 13:44 UTCEPSS rescore
  75. 2026-05-28 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-6732?
CVE-2026-6732 is a high vulnerability published on April 23, 2026. A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that…
When was CVE-2026-6732 disclosed?
CVE-2026-6732 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6732 actively exploited?
CVE-2026-6732 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6732?
CVE-2026-6732 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.
How do I remediate CVE-2026-6732?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6732, 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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