PT-2026-55282 · Eclipse · Wakaama

Vulncheck · Published 2026-07-02 · Updated 2026-07-02 · CVE-2026-58465

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Eclipse Wakaama versions prior to snapshot/2026-05-26

Description An unbounded memory allocation issue exists in the CoAP Block1 handler within the coap/block.c file. Unauthenticated remote attackers can cause a denial of service by sending a sequence of Block1 PUT requests with incrementing block numbers to the registration endpoint over UDP. Because the server appends each block payload to an accumulation buffer without enforcing a maximum total size limit, it repeatedly reallocates memory, leading to server memory exhaustion.

Recommendations Update Eclipse Wakaama to snapshot/2026-05-26 or a newer version.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-58465

Affected Products

Wakaama

References · 7

• https://github.com/eclipse-wakaama/wakaama/commit/a83f1ca28fa090fbc03c3669fef40daf4f89cd03 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-58465 · Security Note
• https://github.com/eclipse-wakaama/wakaama/pull/881 · Note
• https://github.com/eclipse-wakaama/wakaama/releases/tag/snapshots%2F2026-05-26 · Note
• https://twitter.com/CVEnew/status/2072756730929275163 · Twitter Post
• https://vulncheck.com/advisories/eclipse-wakaama-coap-block1-handler-unbounded-memory-allocation-dos · Note
• https://twitter.com/infoflowcloud/status/2072757454811627923 · Twitter Post