Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N L N L N N 2.1 .0039 30.2 —
AFFECTED Product Versions Fixed BookStack 26.05.0 – —
TIMELINE Sep 6 Reserved by VulDB Sep 7 Published (CNA: VulDB) Sep 9 EXPLOIT PUBLISHED — CVE-2026-86285 (BookStack). Public exploit reference added.
A vulnerability was detected in BookStack up to 26.05.2. Affected by this issue is the function AttachmentController::getUpdateForm of the file app/Uploads/Controllers/AttachmentController.php of the component Attachment Edit Endpoint. The manipulation of the argument ID results in improper access controls. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as 4e406c41c4c8060a5795e74c66fb96362e54f400. It is advisable to implement a patch to correct this issue.
| Date | Event | Detail |
|---|---|---|
| September 6, 2026 | Reserved | Reserved by VulDB |
| September 7, 2026 | Published | Published (CNA: VulDB) |
| September 9, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-86285 (BookStack). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| n/a | BookStack | — | 26.05.0 | — |
Authoritative record: CVE-2026-86285 at cve.org
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86285 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
