CVE-2026-5067
- Source
- https://cve.org/CVERecord?id=CVE-2026-5067
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5067.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-5067
- Aliases
-
- GHSA-wgr4-9pwq-94vj
- Published
- 2026-06-09T06:01:02.559Z
- Modified
- 2026-07-10T03:53:33.506980487Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key
- Details
-
A remote, unauthenticated attacker can trigger memory corruption in Zephyr's HTTP server WebSocket upgrade path by sending a crafted Sec-WebSocket-Key header. The HTTP/1 header parser copies the header into a fixed-size buffer using a bounded copy that does not guarantee NUL termination when the input length reaches the buffer size. During upgrade handling the buffer is copied to a local stack buffer and passed to strlen(); if no NUL exists in-bounds, strlen() reads beyond the stack buffer and subsequent concatenation with the WebSocket magic string can write out of bounds. This leads to out-of-bounds read and write on stack memory, resulting in crash (denial of service) and potentially code execution. The path is reachable when CONFIGHTTPSERVER_WEBSOCKET is enabled.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5067.json", "cwe_ids": [ "CWE-170", "CWE-787" ], "cna_assigner": "zephyr" }- References