CVE-2026-55512

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Source
https://cve.org/CVERecord?id=CVE-2026-55512
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55512.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55512
Aliases
Downstream
Related
Published
2026-09-04T19:41:50Z
Modified
2026-09-11T03:30:39Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
nebula-mesh: Unauthenticated OIDC login endpoint allocates unbounded in-memory state entries without rate limiting
Details

nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.2.0 to before version 0.5.0, when OIDC is enabled, GET /ui/oidc/login is reachable without authentication and is registered outside the Web UI rate-limited auth routes. Every request creates a fresh random OIDC state value and stores it in an in-memory map for 10m. Expired states are swept lazily, but there is no rate limit or maximum live-state cap on the allocation path. An unauthenticated remote client can therefore grow OIDC.states for the full state TTL, bounded by request throughput rather than by configured auth rate limits. This issue has been patched in version 0.5.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55512.json"
}
References

Affected packages

Git / github.com/forgekeep/nebula-mesh

Affected ranges

Type
GIT
Repo
https://github.com/forgekeep/nebula-mesh
Events
Introduced
0e34833a1c18e57485c0fe590b294f9e960404ee
Fixed
7186b86821fc210f191eb44bcb52ef108149f02c
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0.2.0"
        },
        {
            "fixed": "0.5.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.4.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55512.json"