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  4. CVE 2026 105867 payload client uploads could overwrite s3 objects
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Back to active CVEs
High · CVSS 7.1CVE-2026-105867

Payload: Client uploads could overwrite S3 objectsCVE-2026-105867

Answer in brief

CVE-2026-105867 records a High severity (CVSS 7.1) vulnerability in Payload: Client uploads could overwrite S3 objects. The current sources do not mark it as known exploited. The current feed maps payloadcms/payload (generic), @payloadcms/storage-s3 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps payloadcms/payload (generic), @payloadcms/storage-s3 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
payloadcms/payloadgeneric<3.90.0 || >=4.0.0-canary.0 <4.0.0-canary.343.90.0, 4.0.0-canary.34
@payloadcms/storage-s3generic<3.90.0 || >=4.0.0-canary.0 <4.0.0-canary.343.90.0, 4.0.0-canary.34

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for payloadcms/payload, @payloadcms/storage-s3.
  2. 2Review the reported fix. Update payloadcms/payload to 3.90.0; @payloadcms/storage-s3 to 3.90.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Payload: Order confirmation validation issue in Payload EcommerceSame payloadcms/payload package
  • Payload: Field access control bypass on auth collectionsSame payloadcms/payload package
  • Payload relationship-query authorization bypassSame payloadcms/payload package
  • Payload: Token refresh and password reset responses may expose restricted user fieldsSame payloadcms/payload package
  • Payload: ReDoS in Multipart Content-Type ValidationSame payloadcms/payload package
  • Payload: Field-level password update restrictions were not enforcedSame payloadcms/payload package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-639
Source
CVE List V5
Source checked
Oct 6, 2026
References
3 linked sources
Open source record