vulnerability / NVI-00017649 / Revision 1
Microsoft.OpenAPI: Circular schema references may terminate OpenAPI parsing
GitHub lists this reviewed advisory for Microsoft.OpenAPI, Microsoft.OpenApi. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.5 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
Microsoft.OpenAPI
source listed>= 3.0.0, <= 3.5.3
### Impact A small OpenAPI document containing a circular schema reference can cause process termination through stack overflow in Microsoft.OpenApi. The issue affects OpenAPI document parsing through public OpenAPI.NET reader APIs and has been confirmed across both JSON and YAML reader paths. ## Affected versions - `>= 2.0.0-preview.11, = 3.0.0, <= 3.5.3` ### Patches - For the 2.X major version, versions 2.7.5 and above are patched. - For the 3.X major version, versions 3.5.4 and above are patched. - For the 1.X major version, the issue does not apply since that version of the library *could not* resolve references that pointed to another reference. ## Impact Applications, CLIs, developer tools, or services that parse untrusted OpenAPI documents in-process may be terminated by a crafted OpenAPI document containing circular schema references. The impact is availability/process termination only. This report does not claim remote code execution, authentication bypass, credential exposure, privilege escalation, data exposure, or Microsoft hosted service impact. ## Details A standalone isolated-process harness confirmed repeatable process termination through pub
Microsoft.OpenApi
source listed>= 2.0.0-preview.11, <= 2.7.4
### Impact A small OpenAPI document containing a circular schema reference can cause process termination through stack overflow in Microsoft.OpenApi. The issue affects OpenAPI document parsing through public OpenAPI.NET reader APIs and has been confirmed across both JSON and YAML reader paths. ## Affected versions - `>= 2.0.0-preview.11, = 3.0.0, <= 3.5.3` ### Patches - For the 2.X major version, versions 2.7.5 and above are patched. - For the 3.X major version, versions 3.5.4 and above are patched. - For the 1.X major version, the issue does not apply since that version of the library *could not* resolve references that pointed to another reference. ## Impact Applications, CLIs, developer tools, or services that parse untrusted OpenAPI documents in-process may be terminated by a crafted OpenAPI document containing circular schema references. The impact is availability/process termination only. This report does not claim remote code execution, authentication bypass, credential exposure, privilege escalation, data exposure, or Microsoft hosted service impact. ## Details A standalone isolated-process harness confirmed repeatable process termination through pub
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-v5pm-xwqc-g5wc ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.