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Snipe-IT CVE-2026-55479

| EUVDEUVD-2026-42998 MEDIUM
Incorrect Authorization (CWE-863)
2026-07-10 security-advisories@github.com
Authentication Bypass Snipe It
5.3
CVSS 4.0 · Vendor: github
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Severity by source

Vendor (github) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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
vuln.today AI
4.3 MEDIUM

Network-reachable with low-privilege authenticated access (PR:L); no confidentiality or availability impact; integrity impact limited to unauthorized license seat reclamation within the same system (S:U).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (github).

CVSS VectorVendor: github

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Patch available
Jul 10, 2026 - 21:02 EUVD
Analysis Generated
Jul 10, 2026 - 20:46 vuln.today

DescriptionCVE.org

Snipe-IT is an IT asset/license management system. Prior to 8.6.2, the legacy single-seat license checkin flow authorizes the action with the checkout permission instead of the checkin permission, allowing a user who can assign licenses but not unassign them to directly access the old checkin endpoint and reclaim a license seat assigned to another user or asset. This issue is fixed in version 8.6.2.

AnalysisAI

Broken authorization in Snipe-IT's legacy single-seat license checkin endpoint allows authenticated users with only checkout (assign) rights to invoke the checkin (unassign) action, bypassing the intended permission boundary. Versions prior to 8.6.2 are affected; this is fixed in v8.6.2. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with checkout-only Snipe-IT account
Delivery
Identify legacy single-seat checkin endpoint via source or enumeration
Exploit
Send crafted HTTP request to legacy endpoint
Execution
Application validates checkout permission instead of checkin
Persist
Unauthorized checkin succeeds
Impact
License seat reclaimed from legitimate assignee
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Vulnerability AssessmentAI

Exploitation Exploitation requires an active, authenticated Snipe-IT session for an account that holds the license checkout (assign) permission but has NOT been granted the checkin (unassign) permission. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (score 5.3, Medium) accurately reflects the constrained blast radius: integrity impact is low and scoped only to the vulnerable system (VI:L, SI:N), and there is no confidentiality or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated Snipe-IT user with only license-checkout (assignment) rights identifies the legacy single-seat checkin endpoint URL - discoverable via source code inspection or API enumeration. By crafting a direct HTTP request to that endpoint referencing a license seat assigned to another user or asset, the attacker successfully triggers a checkin, reclaiming the seat without ever holding the checkin permission. …
Remediation Upgrade Snipe-IT to version 8.6.2 or later, which corrects the permission predicate in the legacy single-seat checkin endpoint to enforce the checkin permission rather than the checkout permission. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-55479 vulnerability details – vuln.today
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