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.

CVE-2026-86766

CVE-2026-86766HIGH

grokability snipe-it — Snipe-IT 8.6.3 Race Condition via Consumable Checkout

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   N   H   N    7.1   .0035   26.0     —

AFFECTED
  Product   Versions  Fixed
  snipe-it  8.6.3 –   8.7.0

TIMELINE
  Sep 8   Reserved by VulnCheck
  Sep 9   Published (CNA: VulnCheck)
  Sep 16  EXPLOIT PUBLISHED — CVE-2026-86766 (grokability snipe-it). Public exploit reference added.

CWE-362 · CNA: VulnCheck · CVSS v4.0 · 3 references · NVD status: Analyzed

Description

Snipe-IT versions up to and including 8.6.3 contain a race condition (TOCTOU) in the consumable checkout API endpoint (POST /api/v1/consumables/{consumable_id}/checkout). The requested quantity is validated against the number of remaining units before the database transaction begins, and the transaction then creates the checkout records without locking the consumable row or re-checking availability. An authenticated user with permission to check out consumables can submit concurrent checkout requests for the same consumable so that both requests pass the availability check and succeed, over-allocating stock and driving the remaining inventory negative (e.g., a consumable with 1 remaining unit ends at -1 after two concurrent 1-unit checkouts). The issue is fixed in 8.7.0, which re-fetches the parent row under lockForUpdate inside the transaction and re-validates availability.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 8, 2026	Reserved	Reserved by VulnCheck
September 9, 2026	Published	Published (CNA: VulnCheck)
September 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-86766 (grokability snipe-it). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
grokability	snipe-it	—	8.6.3	8.7.0

Weaknesses

CWE-362

References (3)

https://github.com/grokability/snipe-it/commit/f71806b1e0efbd3bc2b6be61994ad2a5d5d6c206 [Patch]
https://github.com/grokability/snipe-it/security/advisories/GHSA-x4g2-87xc-m5jm [Exploit, Vendor Advisory]
https://www.vulncheck.com/advisories/snipe-it-8.6.3-race-condition-via-consumable-checkout [Third Party Advisory]

Authoritative record: CVE-2026-86766 at cve.org

Vendors: grokability

Weaknesses: CWE-362

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86766 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.