CVE-2026-54638

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Source
https://cve.org/CVERecord?id=CVE-2026-54638
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54638.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54638
Aliases
Published
2026-07-28T22:14:53.550Z
Modified
2026-07-31T03:34:02.337208476Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode
Details

gotd/td is a T Telegram MTProto API client in Go. Prior to 0.145.1, proto.UnencryptedMessage.Decode in proto/unencrypted_message.go read attacker controlled dataLen from an unauthenticated MTProto unencrypted packet and allocated make([]byte, dataLen) before checking the remaining buffer, allowing remote unauthenticated denial of service through excessive memory allocation and CPU or garbage collection pressure. This issue is fixed in version 0.145.1.

Database specific 
{
    "cwe_ids": [
        "CWE-770",
        "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54638.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/gotd/td

Affected ranges

Type
GIT
Repo
https://github.com/gotd/td
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9d5d1f31ea5022d9798d84ccce15de2e91ba6baa
Fixed
c540a4d2ff90b7343abf3bed624646d4489f7d3e
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.145.1"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.10.0
v0.100.0
v0.101.0
v0.102.0
v0.103.0
v0.103.0-alpha.0
v0.104.0
v0.105.0
v0.106.0
v0.107.0
v0.108.0
v0.109.0
v0.11.0
v0.11.1
v0.11.2
v0.110.0
v0.110.1
v0.111.0
v0.111.1
v0.111.2
v0.112.0
v0.113.0
v0.114.0
v0.114.0-alpha.0
v0.114.0-alpha.1
v0.115.0
v0.116.0
v0.117.0
v0.118.0
v0.119.0
v0.12.0
v0.120.0
v0.121.0
v0.122.0
v0.123.0
v0.124.0
v0.125.0
v0.126.0
v0.127.0
v0.128.0
v0.129.0
v0.13.0
v0.13.1
v0.130.0
v0.131.0
v0.132.0
v0.133.0
v0.134.0
v0.135-alpha.0
v0.135.0
v0.136.0
v0.137.0
v0.138.0
v0.139.0
v0.14.0
v0.140.0
v0.141.0
v0.142.0
v0.143.0
v0.144.0
v0.145.0
v0.15.0
v0.15.1
v0.16.0
v0.17.0
v0.17.1
v0.17.2
v0.18.0
v0.18.1
v0.19.0
v0.19.1
v0.2.0
v0.20.0
v0.21.0
v0.21.1
v0.21.2
v0.22.0
v0.23.0
v0.24.0
v0.25.0
v0.26.0
v0.26.1
v0.26.2
v0.26.3
v0.27.0
v0.27.1
v0.28.0
v0.28.1
v0.29.0
v0.3.0
v0.30.0
v0.31.0
v0.31.1
v0.32.0
v0.33.0
v0.33.1
v0.33.2
v0.33.3
v0.34.0
v0.35.0
v0.36.0
v0.37.0
v0.38.0
v0.39.0
v0.39.0-alpha.1
v0.39.1
v0.4.0
v0.40.0
v0.40.0-rc.1
v0.41.0
v0.41.1
v0.42.0-alpha.1
v0.42.0-alpha.2
v0.42.0-alpha.3
v0.42.0-alpha.4
v0.42.0-alpha.5
v0.43.0
v0.43.1
v0.44.0-alpha.1
v0.44.0-alpha.2
v0.44.0-alpha.3
v0.44.0-alpha.4
v0.45.0
v0.45.1
v0.45.2
v0.45.3
v0.46.0
v0.47.0-alpha.1
v0.47.0-alpha.2
v0.47.0-alpha.3
v0.47.0-alpha.4
v0.48.0
v0.49.0
v0.49.0-alpha.1
v0.5.0
v0.50.0
v0.50.0-alpha.0
v0.50.0-alpha.1
v0.50.0-alpha.2
v0.50.0-alpha.3
v0.50.0-alpha.4
v0.51.0
v0.51.0-alpha.0
v0.51.0-alpha.1
v0.51.0-alpha.2
v0.51.1
v0.51.2
v0.52.0
v0.52.0-alpha.0
v0.53.0
v0.53.0-alpha.0
v0.53.0-alpha.1
v0.53.0-alpha.2
v0.54.0
v0.54.0-alpha.0
v0.54.0-alpha.1
v0.54.0-alpha.2
v0.54.0-alpha.3
v0.54.0-alpha.4
v0.54.0-alpha.5
v0.54.1
v0.55.0
v0.55.1
v0.55.2
v0.55.2-pre
v0.56.0
v0.56.0-alpha.0
v0.56.0-alpha.1
v0.57.0
v0.58.0
v0.58.1-alpha.0
v0.59.0
v0.6.0
v0.60.0
v0.61.0
v0.62.0
v0.63.0
v0.64.0
v0.65.0
v0.66.0
v0.67.0
v0.68.0
v0.68.1
v0.69.0
v0.69.1
v0.7.0
v0.7.1
v0.70.0
v0.70.1
v0.71.0
v0.72.0
v0.73.0
v0.74.0
v0.75.0
v0.76.0
v0.76.1
v0.77.0
v0.78.0
v0.79.0
v0.8.0
v0.80.0
v0.80.0-alpha.0
v0.80.0-alpha.1
v0.80.0-alpha.2
v0.81.0
v0.82.0
v0.83.0
v0.84.0
v0.85.0
v0.86.0
v0.87.0
v0.88.0
v0.89.0
v0.9.0
v0.9.1
v0.90.0
v0.90.0-alpha.1
v0.91.0
v0.92.0
v0.93.0
v0.94.0
v0.95.0
v0.95.1
v0.96.0
v0.96.1
v0.97.0
v0.98.0
v0.99.0
v0.99.1
v0.99.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54638.json"