CVE-2026-26456CWE-362CWE-476

CVE-2026-26456

High · published August 27, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
30.4
In the wild
Unconfirmed
What it is

A null pointer dereference vulnerability exists in the server-side session management logic of ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5. The issue is caused by a race condition between the request dispatch thread and the session cleanup thread when accessing shared session list nodes without proper synchronization.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00377 · 30.4th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-476 · NULL Pointer Dereference
Published
2026-08-27T21:17Z
References (2)
https://github.com/ipflavors/ccoap · [email protected]https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT5.md · [email protected]
EPSS history
Timeline
  • 27 AUG 00:00Z
    A null pointer dereference vulnerability exists in the server-side session management logic of ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5
    cvelistv5