CVE-2026-34750

mediumpriority · track · 0EPSS 0.003 · 27 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.34% (27th) EPSS

CVSS 6.5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22US

affected products (6)

Products and version ranges known to be affected.

payloadcms payload≤ < 3.78.0enisa_euvdEU
payloadcms payload< 3.78.0nvdUScpe:2.3:a:payloadcms:payload:*:*:*:*:*:*:*:*
npm @payloadcms/storage-azure< 3.78.0osvUSpkg:npm/%40payloadcms/storage-azure
npm @payloadcms/storage-gcs< 3.78.0osvUSpkg:npm/%40payloadcms/storage-gcs
npm @payloadcms/storage-r2< 3.78.0osvUSpkg:npm/%40payloadcms/storage-r2
npm @payloadcms/storage-s3< 3.78.0osvUSpkg:npm/%40payloadcms/storage-s3

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-frq9-7j6g-v74xPayload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints2026-04-01ghsa · osvUS
### Impact 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. Consumers are affected if ALL of these are true: - Payload version **< v3.78.0** - Using client-upload signed-URL endpoints for any supported storage adapter ## Patches This vulnerability has been patched in **v3.78.0**. Filename validation has been hardened for client uploads. Consumers should upgrade to **v3.78.0** or later. ## Workarounds Consumers can upgrade: - Limit access to client-upload signed-URL endpoints to trusted users only.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-04-01modified 2026-10-25

references (4)

External citations — patches, advisories, analysis.

scry

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