CVE-2026-34750: Payload is a free and open source headless content management system

Routine

MEDIUM 6.5UPGRADE

CVE-2026-34750 is a medium-severity flaw (CVSS 6.5) affecting payload. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3, the client-upload signed-URL endpoints for S3, GCS, Azure, and R2 did not properly sanitize filenames. An attacker could craft filenames to escape the intended storage location. This issue has been patched in version 3.78.0 for @payloadcms/storage-a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-01
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: payloadcms

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 20:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

payloadcms payload UPGRADE

Affected: < 3.78.0

Fixed in: 3.78.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls payload

2. UPGRADE to 3.78.0

npm install payload@">=3.78.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34750?

payload: upgrade to 3.78.0. Exact commands for each OS are on this page.

Is CVE-2026-34750 being exploited?

CVE-2026-34750 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34750 affect?

CVE-2026-34750 affects payload. Severity is medium (CVSS 6.5). Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3, the client-upload signed-URL endpoints

How urgent is CVE-2026-34750?

Priority 30/100. No elevated risk signals yet.

Software pages

Azure vulnerabilities

References

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