CVE-2026-58465 (GCVE-0-2026-58465)

Vulnerability from cvelistv5 – Published: 2026-07-02 17:55 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
Title
Eclipse Wakaama CoAP Block1 Handler Unbounded Memory Allocation DoS
Summary
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.
Severity
8.7 (High)
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
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 19:21 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6697 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
eclipse-wakaama wakaama Affected: 0 , < snapshot/2026-05-26 (custom)
    cpe:2.3:a:eclipse:wakaama:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-03-25 00:00
Credits
Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck
Show details on NVD website
To clipboard 

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