EUVD-2026-93513Published

Payload: Client uploads could overwrite S3 objects

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-105867

Published

Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Source published: 6 Oct 2026 16:49:12 UTC
Source modified: 6 Oct 2026 17:24:39 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

euvd · EUVD-2026-93513

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 6, 2026, 4:49:12 PM

dateUpdated: Oct 6, 2026, 5:24:39 PM

Source published: Oct 6, 2026, 4:49:12 PM (timezone not stated)
Source modified: Oct 6, 2026, 5:24:39 PM (timezone not stated)
Observed here: 9 Nov 2026 05:06:05 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

nvd · CVE-2026-105867

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-639

Original publisher date fields

published: 2026-10-06T17:17:23.137

lastModified: 2026-10-15T00:07:52.077

35 source CPE criteria · context only

cpe:2.3:a:payloadcms:payload:*:*:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary0:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary1:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary10:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary11:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary12:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary13:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary14:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary15:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary16:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary17:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary18:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary19:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary2:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary20:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary21:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary22:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary23:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary24:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary25:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary26:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary27:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary28:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary29:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary3:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary30:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary31:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary32:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary33:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary4:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary5:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary6:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary7:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary8:*:*:*:node.js:*:*
cpe:2.3:a:payloadcms:payload:4.0.0:canary9:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 6 Oct 2026 17:17:23 UTC
Source modified: 15 Oct 2026 00:07:52 UTC
Observed here: 25 Oct 2026 04:17:41 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Primary · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

osv · GHSA-7vg8-29qx-jgj8

Published

### Impact An authenticated user could overwrite an existing S3 object belonging to another upload collection, bypassing that collection’s access controls and prior file validation. You are affected if ALL of these are true: - Client uploads are enabled for multiple collections that share an S3 bucket. - useCompositePrefixes is not configured or is set to `false`. ### Patches Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ### Workarounds Disable client uploads until you can upgrade.

Source published: 7 Oct 2026 20:28:59 UTC
Source modified: 7 Oct 2026 20:45:04 UTC
Observed here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

Publisher rating · HIGH