CVE-2026-58465

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Source

https://cve.org/CVERecord?id=CVE-2026-58465

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58465.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-58465

Published

2026-07-02T17:55:12.038Z

Modified

2026-07-15T01:49:08.774353743Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Eclipse Wakaama CoAP Block1 Handler Unbounded Memory Allocation DoS

Details

Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remote attackers to exhaust server memory by sending a sequence of Block1 PUT requests with incrementing block numbers. Attackers can target the registration endpoint over UDP without authentication, causing the server to repeatedly reallocate a growing accumulation buffer by appending each block payload without enforcing any maximum total size limit, resulting in denial of service through memory exhaustion.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58465.json"
}

References

Affected packages

Git / github.com/eclipse-wakaama/wakaama

Affected ranges

Type

GIT

Repo

https://github.com/eclipse-wakaama/wakaama

Events

Introduced

Fixed

a83f1ca28fa090fbc03c3669fef40daf4f89cd03

Database specific

{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "snapshot/2026-05-26"
        }
    ]
}

Affected versions

Other

snapshots/2022-08-03

snapshots/2023-03-31

v1.*

v1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58465.json"