How severe is CVE-2026-34748?

CVE-2026-34748 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-34748 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34748?

CVE-2026-34748 affects Payloadcms Payload. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34748?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34748 have an EU (EUVD) identifier?

Yes. CVE-2026-34748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18015.

When was CVE-2026-34748 published?

CVE-2026-34748 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2026-34748

CVE-2026-34748 is a high-severity vulnerability in Payloadcms Payload with a CVSS 3.x base score of 8.7. 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: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18015
Weakness: CWE-79
Affected product: Payloadcms Payload
Published: 2026-04-01
Last modified: 2026-06-17

Description

Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/next, a stored Cross-Site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser. This issue has been patched in version 3.78.0.

Frequently asked questions

What is CVE-2026-34748?: Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/next, a stored Cross-Site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser. This issue has been patched in version 3.78.0.
How severe is CVE-2026-34748?: CVE-2026-34748 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-34748 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34748?: CVE-2026-34748 affects Payloadcms Payload. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34748?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34748 have an EU (EUVD) identifier?: Yes. CVE-2026-34748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18015.
When was CVE-2026-34748 published?: CVE-2026-34748 was published on 2026-04-01 and last updated on 2026-06-17.

References

https://github.com/payloadcms/payload/security/advisories/GHSA-mmxc-95ch-2j7c

Affected products (1)

cpe:2.3:a:payloadcms:payload:*:*:*:*:*:node.js:*:*

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