CVE-2026-53965 MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service
| Reporter | Title | Published | Views | Family All 8 |
|---|---|---|---|---|
 | CVE-2026-53965 | 19 Aug 202608:01 | – | circl |
 | CVE-2026-53965 | 25 Aug 202620:36 | – | cve |
 | EUVD-2026-66113 | 25 Aug 202620:36 | – | euvd |
 | Client HttpTransport SSE buffer grows unbounded when server withholds the event delimiter | 14 Aug 202606:19 | – | friendsofphp |
 | MCP PHP SDK: client HttpTransport SSE buffer (sseBuffer .= chunk) grows unbounded when server withholds the event delimiter | 19 Aug 202619:17 | – | github |
 | CVE-2026-53965 | 25 Aug 202621:17 | – | nvd |
 | GHSA-7M52-JW36-44R3 MCP PHP SDK: client HttpTransport SSE buffer (sseBuffer .= chunk) grows unbounded when server withholds the event delimiter | 19 Aug 202619:17 | – | osv |
 | PT-2026-80737 | 19 Aug 202600:00 | – | ptsecurity |
[
{
"vendor": "modelcontextprotocol",
"product": "php-sdk",
"versions": [
{
"version": ">= 0.5.0, < 0.7.1",
"status": "affected"
}
]
}
]Data
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25 Aug 2026 20:36Current
CVSS 46.9