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
2026-08-12T16:41:36.729096Z
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 
{
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58465.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/eclipse-wakaama/wakaama

Affected ranges

Type
GIT
Repo
https://github.com/eclipse-wakaama/wakaama
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a83f1ca28fa090fbc03c3669fef40daf4f89cd03
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "snapshot/2026-05-26"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

Other
snapshots/2022-08-03
snapshots/2023-03-31
v1.*
v1.0

Database specific

vanir_signatures 
[
    {
        "target": {
            "file": "tests/coap_block1tests.c"
        },
        "id": "CVE-2026-58465-2d561d96",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "254574986245705885662859023578170410883",
                "155392224499935136968742554198138353894",
                "268159411966634232766203272479565361860",
                "236939823293802254555735352902235955941",
                "136003925378428211672187817758103963686",
                "36423602874163882900132844395046552873",
                "59498748051464752253410391580504916921"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/eclipse-wakaama/wakaama/commit/a83f1ca28fa090fbc03c3669fef40daf4f89cd03",
        "deprecated": false
    },
    {
        "target": {
            "function": "prv_coap_block_handler",
            "file": "coap/block.c"
        },
        "id": "CVE-2026-58465-a0b40c5a",
        "signature_type": "Function",
        "digest": {
            "function_hash": "248155539965842206699278287991987471196",
            "length": 1494.0
        },
        "signature_version": "v1",
        "source": "https://github.com/eclipse-wakaama/wakaama/commit/a83f1ca28fa090fbc03c3669fef40daf4f89cd03",
        "deprecated": false
    },
    {
        "target": {
            "file": "coap/block.c"
        },
        "id": "CVE-2026-58465-eaa84f1d",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "40634180268366884496138022984649067380",
                "212405834832827732985586244637627649933",
                "230231201715750187825274237849696519263",
                "293305728399603890987630647751350716057",
                "174649095191718470396214942515235351382",
                "192257635115597055900902778847850343544",
                "234375329169740172336585081790780506921",
                "114667304822017033816334418361744942761",
                "337447643777904453855818732707196117823",
                "4059139140162262212724154641559360268"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/eclipse-wakaama/wakaama/commit/a83f1ca28fa090fbc03c3669fef40daf4f89cd03",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-12T16:41:36Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58465.json"