CVE-2026-56100

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Source
https://cve.org/CVERecord?id=CVE-2026-56100
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56100.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-56100
Published
2026-08-28T18:00:36Z
Modified
2026-10-28T02:30:27Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
SpringBlade 2.7.3 < 5.0.0 Privilege Escalation via Exposed Feign Endpoint
Details

SpringBlade versions from 2.7.3 up to but not including 5.0.0 contain a privilege escalation vulnerability that allows authenticated attackers to create system administrator accounts by sending crafted POST requests to an unprotected internal Feign user-creation endpoint exposed via @RestController without authorization checks. Attackers can exploit the gateway's authentication filter, which only validates JWT parsing without verifying user roles or caller identity, and leverage a hardcoded JWT signing key embedded in publicly available JARs to forge tokens and escalate privileges from a low-privilege user to administrator, enabling cross-tenant data pollution and persistent backdoor access.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56100.json"
}
References

Affected packages

Git / github.com/chillzhuang/springblade

Affected ranges

Type
GIT
Repo
https://github.com/chillzhuang/springblade
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
079fc00e44f582f866a0ec6fd26d87417b742044
Fixed
c69b9547c942c697da2f3ee6a9265b6004abd645
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "2.7.3"
                },
                {
                    "fixed":  "5.0.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "fixed":  "c69b9547c942c697da2f3ee6a9265b6004abd645"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

4.*
4.1.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.03
v3.1.0
v3.2.0
v3.3.0
v3.3.1
v3.4.0
v3.4.1
v3.5.0
v3.6.0
v3.7.0
v3.7.1
v4.*
v4.0.0
v4.10.0
v4.2.0
v4.3.0
v4.4.0
v4.5.0
v4.6.0
v4.7.0
v4.8.0
v4.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56100.json"