CVE-2026-82405

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Source
https://cve.org/CVERecord?id=CVE-2026-82405
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82405.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-82405
Aliases
Published
2026-09-23T19:26:12Z
Modified
2026-10-28T02:30:48Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Klever-Go Account takeover: `kleverUpdateAccountPermission` authorizes on attacker-controlled `RecipientAddr` instead of the authenticated caller
Details

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the KleverUpdateAccountPermission built-in authorizes replacement of a target account's permissions by checking attacker-controlled vmInput.RecipientAddr instead of authenticated vmInput.CallerAddr. An attacker-controlled contract can choose a victim account with configured permissions as RecipientAddr, and contractHasValidPermission can accept the victim's default self-signer as authorization. UpdatePermission can then replace the victim's entire permission set with attacker-supplied Owner permissions, enabling asset theft or permanent lockout without a victim key or signature. Accounts without stored permissions and the native transaction path are not affected. This issue is fixed in version 1.7.20.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82405.json"
}
References

Affected packages

Git / github.com/klever-io/klever-go

Affected ranges

Type
GIT
Repo
https://github.com/klever-io/klever-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0b70b0f1a1f5d95ac07c2038c227db7f18976a2a
Fixed
c58740eb74d7ee8f07db1e18a7d6214b5559ba32
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.7.20"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "c58740eb74d7ee8f07db1e18a7d6214b5559ba32"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v1.7.20",
            "range": [
                {
                    "fixed": "0b70b0f1a1f5d95ac07c2038c227db7f18976a2a"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v1.*
v1.7.14
v1.7.15
v1.7.16
v1.7.17
v1.7.18
v1.7.19

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82405.json"