How severe is CVE-2026-50219?

CVE-2026-50219 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-50219 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50219?

CVE-2026-50219 affects Libexpat Project Libexpat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50219?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-50219 have an EU (EUVD) identifier?

Yes. CVE-2026-50219 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34206.

When was CVE-2026-50219 published?

CVE-2026-50219 was published on 2026-06-04 and last updated on 2026-06-17.

CVE-2026-50219

CVE-2026-50219 is a medium-severity vulnerability in Libexpat Project Libexpat with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34206
Weakness: CWE-416
Affected product: Libexpat Project Libexpat
Published: 2026-06-04
Last modified: 2026-06-17

Description

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,

Frequently asked questions

What is CVE-2026-50219?: 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,
How severe is CVE-2026-50219?: CVE-2026-50219 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-50219 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-50219?: CVE-2026-50219 affects Libexpat Project Libexpat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50219?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-50219 have an EU (EUVD) identifier?: Yes. CVE-2026-50219 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34206.
When was CVE-2026-50219 published?: CVE-2026-50219 was published on 2026-06-04 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

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