CVE-2026-82405

See a problem?
Please try reporting it to the source first.

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

GHSA-97cv-x867-6xhm

Published

2026-09-23T19:26:12Z

Modified

2026-09-24T03:46:52Z

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

Fixed

0b70b0f1a1f5d95ac07c2038c227db7f18976a2a

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.7.20"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

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"