How severe is CVE-2026-42839?

CVE-2026-42839 has a CVSS 4.0 base score of 4.8, rated medium severity.

Is CVE-2026-42839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42839?

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

Does CVE-2026-42839 have an EU (EUVD) identifier?

Yes. CVE-2026-42839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34158.

When was CVE-2026-42839 published?

CVE-2026-42839 was published on 2026-06-03 and last updated on 2026-06-17.

CVE-2026-42839

CVE-2026-42839 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 4.0 base score 4.8)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34158
Weakness: CWE-79
Published: 2026-06-03
Last modified: 2026-06-17

Description

An authenticated ERPNext user with Item record edit permissions can persist arbitrary HTML/JavaScript in the item_name, description, or image fields of an Item and trigger unescaped rendering in the Point of Sale (POS) cart interface for every operator who adds that item to a transaction.This issue affects ERPNext: 16.16.0.

Frequently asked questions

What is CVE-2026-42839?: An authenticated ERPNext user with Item record edit permissions can persist arbitrary HTML/JavaScript in the item_name, description, or image fields of an Item and trigger unescaped rendering in the Point of Sale (POS) cart interface for every operator who adds that item to a transaction.This issue affects ERPNext: 16.16.0.
How severe is CVE-2026-42839?: CVE-2026-42839 has a CVSS 4.0 base score of 4.8, rated medium severity.
Is CVE-2026-42839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42839 have an EU (EUVD) identifier?: Yes. CVE-2026-42839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34158.
When was CVE-2026-42839 published?: CVE-2026-42839 was published on 2026-06-03 and last updated on 2026-06-17.

References

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