Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
An authenticated user could overwrite existing S3 objects belonging to another upload collection in the npm package @payloadcms/storage-s3, affecting versions below 3.90.0 and 4.0.0-canary.0 up to (not including) 4.0.0-canary.34. The issue applies only when client uploads are enabled for multiple collections sharing one S3 bucket and useCompositePrefixes is unset or false. Upgrade to 3.90.0 or 4.0.0-canary.34 or later; until then, the source suggests disabling client uploads.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.1 | High | 4.0 | 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0022, the 12th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:33 UTC First seen by agentprime
- 31 Oct 2026, 13:33 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-7vg8-29qx-jgj8
- OSV: GHSA-7vg8-29qx-jgj8
- github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8
- nvd.nist.gov/vuln/detail/CVE-2026-105867
- github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2
- github.com/payloadcms/payload
- github.com/payloadcms/payload/releases/tag/v3.90.0