CVE-2026-50219

MEDIUMNVD 5.94.9▼
EchelonGraph scoreHIGH confidence

Score 4.9 from GitHub Security Advisory published 2026-06-04. NVD baseline CVSS 5.9; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 0

A fix is available — apply it.

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,

CVSS v3
5.9
EG Score
4.9(high)
EPSS
12.3%
KEV
Not listed

Published

June 4, 2026

Last Modified

June 4, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
github_pr

[CVE-2026-50219] Introduce handler call depth tracking

Fix merged in libexpat/libexpat PR #1246 on 2026-06-04 — awaiting tagged release

https://github.com/libexpat/libexpat/pull/1246

Vendor Advisories for CVE-2026-50219(3)

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
redhatexpat-main-2.8.2-1.hum12026-06-28redhat

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 18× in last 7d / 93× 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 104 total refreshes for this CVE.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 02:23 UTCEPSS rescore
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-04 06:31 UTCEPSS rescore
  5. 2026-07-03 19:29 UTCEG score recompute
  6. 2026-07-03 19:29 UTCVendor advisory
  7. 2026-07-03 19:29 UTCGHSA enrichment
  8. 2026-07-02 17:03 UTCEG score recompute
  9. 2026-07-02 17:03 UTCVendor advisory
  10. 2026-07-02 17:03 UTCGHSA enrichment
  11. 2026-07-01 18:46 UTCEG score recompute
  12. 2026-07-01 18:46 UTCVendor advisory
  13. 2026-07-01 18:46 UTCGHSA enrichment
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-30 21:00 UTCEG score recompute
  17. 2026-06-30 21:00 UTCVendor advisory
  18. 2026-06-30 21:00 UTCGHSA enrichment
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 12:44 UTCEG score recompute
  22. 2026-06-29 12:44 UTCVendor advisory
  23. 2026-06-29 12:44 UTCGHSA enrichment
  24. 2026-06-28 15:01 UTCEG score recompute
  25. 2026-06-28 15:01 UTCGHSA enrichment
Show 75 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 17:16 UTCEG score recompute
  5. 2026-06-27 17:16 UTCGHSA enrichment
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-26 19:32 UTCEG score recompute
  8. 2026-06-26 19:32 UTCGHSA enrichment
  9. 2026-06-25 21:49 UTCEG score recompute
  10. 2026-06-25 21:49 UTCGHSA enrichment
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-25 00:03 UTCEG score recompute
  13. 2026-06-25 00:03 UTCGHSA enrichment
  14. 2026-06-24 14:05 UTCEPSS rescore
  15. 2026-06-24 02:20 UTCEG score recompute
  16. 2026-06-24 02:20 UTCGHSA enrichment
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-23 21:33 UTCEPSS rescore
  19. 2026-06-23 04:37 UTCEG score recompute
  20. 2026-06-23 04:37 UTCGHSA enrichment
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-19 20:19 UTCEG score recompute
  26. 2026-06-19 20:19 UTCGHSA enrichment
  27. 2026-06-19 19:26 UTCEPSS rescore
  28. 2026-06-19 19:26 UTCEPSS rescore
  29. 2026-06-18 21:28 UTCEG score recompute
  30. 2026-06-18 21:28 UTCGHSA enrichment
  31. 2026-06-18 17:52 UTCEPSS rescore
  32. 2026-06-18 17:52 UTCEPSS rescore
  33. 2026-06-17 19:18 UTCEG score recompute
  34. 2026-06-17 19:18 UTCGHSA enrichment
  35. 2026-06-17 17:53 UTCEPSS rescore
  36. 2026-06-16 21:35 UTCEG score recompute
  37. 2026-06-16 21:35 UTCGHSA enrichment
  38. 2026-06-15 23:52 UTCEG score recompute
  39. 2026-06-15 23:52 UTCGHSA enrichment
  40. 2026-06-15 17:49 UTCEPSS rescore
  41. 2026-06-15 17:49 UTCEPSS rescore
  42. 2026-06-15 02:09 UTCEG score recompute
  43. 2026-06-15 02:08 UTCGHSA enrichment
  44. 2026-06-14 23:18 UTCEPSS rescore
  45. 2026-06-14 04:25 UTCEG score recompute
  46. 2026-06-14 04:25 UTCGHSA enrichment
  47. 2026-06-13 23:00 UTCEPSS rescore
  48. 2026-06-13 06:42 UTCEG score recompute
  49. 2026-06-13 06:42 UTCGHSA enrichment
  50. 2026-06-12 23:12 UTCEPSS rescore
  51. 2026-06-12 23:12 UTCEPSS rescore
  52. 2026-06-12 08:59 UTCEG score recompute
  53. 2026-06-12 08:58 UTCGHSA enrichment
  54. 2026-06-11 14:00 UTCEPSS rescore
  55. 2026-06-11 11:15 UTCEG score recompute
  56. 2026-06-11 11:14 UTCGHSA enrichment
  57. 2026-06-10 22:19 UTCEPSS rescore
  58. 2026-06-10 13:31 UTCEG score recompute
  59. 2026-06-10 13:31 UTCGHSA enrichment
  60. 2026-06-10 13:22 UTCEPSS rescore
  61. 2026-06-09 15:48 UTCEG score recompute
  62. 2026-06-09 15:48 UTCGHSA enrichment
  63. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 5.9
  64. 2026-06-08 18:05 UTCEG score recompute
  65. 2026-06-08 18:05 UTCGHSA enrichment
  66. 2026-06-08 14:17 UTCEPSS rescore
  67. 2026-06-07 20:22 UTCEG score recompute
  68. 2026-06-07 20:22 UTCGHSA enrichment
  69. 2026-06-06 22:39 UTCEG score recompute
  70. 2026-06-06 22:39 UTCGHSA enrichment
  71. 2026-06-06 13:47 UTCEPSS rescore
  72. 2026-06-06 00:55 UTCEG score recompute
  73. 2026-06-06 00:55 UTCGHSA enrichment
  74. 2026-06-05 22:47 UTCEPSS rescore
  75. 2026-06-05 06:10 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-50219?
CVE-2026-50219 is a medium vulnerability published on June 4, 2026. libexpat before 2.8.2 lacks handler call depth tracking for calls to XMLGetBuffer, XMLParse, XMLParseBuffer, XMLParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
When was CVE-2026-50219 disclosed?
CVE-2026-50219 was first published in the National Vulnerability Database on June 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50219 actively exploited?
CVE-2026-50219 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50219?
CVE-2026-50219 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 4.9.
How do I remediate CVE-2026-50219?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50219, 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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