CVE-2026-30796

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Source
https://cve.org/CVERecord?id=CVE-2026-30796
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30796.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-30796
Published
2026-03-05T15:30:39Z
Modified
2026-08-12T03:51:17Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N CVSS Calculator
Summary
RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync
Details

Cleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules) allows Sniffing Attacks.

The client places the preset address-book password verbatim into the heartbeat sync JSON body (src/hbbs_http/sync.rs). Over an intact HTTPS session it is not exposed in transit, but it is a reusable shared secret rather than a zero-knowledge proof, so it is recovered by any party that becomes the API endpoint - under the re-homed/rogue API server (CVE-2026-30797) - and the leaked credential then authorizes the server-side address book.

This vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password).

This issue affects RustDesk Client: through 1.4.8.

Database specific 
{
    "cna_assigner": "VULSec",
    "cwe_ids": [
        "CWE-522"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30796.json"
}
References

Affected packages

Git / github.com/rustdesk/rustdesk

Affected ranges

Type
GIT
Repo
https://github.com/rustdesk/rustdesk
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
9ded8d6ab24779db3c9334f5a3d6a652b8425c4f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.4.8"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.1.3
1.1.8
1.1.9
1.2.0
1.2.1
1.2.2
1.2.3
1.2.3-1
1.2.3-2
1.2.4
1.2.5
1.2.6
1.2.7
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
Other
fdroid-version
nightly

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30796.json"