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
2026-07-02T17:55:12Z
Modified
2026-10-28T11:10:05Z
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
0 Unknown introduced commit / All previous commits are affected
Fixed
94ff56f77a2d24a5890e0e703809a47633aa7d4b
Fixed
a83f1ca28fa090fbc03c3669fef40daf4f89cd03
Database specific
Show details 
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                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "fixed":  "a83f1ca28fa090fbc03c3669fef40daf4f89cd03"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

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"
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