DEBIAN-CVE-2026-11404
Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg_tls_server_recv_hello(), which uses an attacker-controlled session_id_len byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated attacker can send a single crafted ClientHello with an oversized session id length to read past the receive buffer, crashing any HTTPS, MQTTS, or WSS service built on MG_TLS_BUILTIN.
DEBIAN-CVE-2026-11404
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-11404
mongoose
Source reference: /affected/0/package/name
- Affected versions
- 7.21+ds-1
Source reference:
/affected/0/versions7.21+ds-1~bpo13+1Source reference:
/affected/0/versions7.21+ds-2Source reference:
/affected/0/versions7.22+ds-1~bpo13+1Source reference:
/affected/0/versions - Fixed versions
- 7.22+ds-1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.22+ds-1"
}
]
}
],
"package": {
"name": "mongoose",
"purl": "pkg:deb/debian/mongoose?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.21+ds-1",
"7.21+ds-1~bpo13+1",
"7.21+ds-2",
"7.22+ds-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11404.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55450 · Revision 1
- Added to Heist Feed
- Publisher date