CVE-2026-58465 | Eclipse Wakaama before snapshot/2026-05-26 contains an unbou… | CVSS 7.5 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-58465
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-30 20:20 UTC
Published: 2026-07-02 17:55 UTC
Last updated: 2026-07-02 19:21 UTC
Primary CWE: CWE-770
Allocation of Resources Without Limits or Throttling
Vendor / Product: eclipse-wakaama / wakaama
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
eclipse-wakaama	wakaama	—	0 < snapshot/2026-05-26

Weakness (CWE)

CWE	Source	Description
CWE-770	cna	Allocation of Resources Without Limits or Throttling

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	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	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (4)