CVE-2026-73261

The Mongoose embedded web server and network library (versions prior to 7.23 ) contains a vulnerability in its built-in TCP/IP stack. Specifically, the handle_opt() function in src/net_builtin.c fails to validate that the opts[1] length of a TCP option does not exceed the remaining option bytes. ...

CVE-2026-73260 Mongoose: Out-of-bounds Read via length-counter underflow in built-in TLS X.509 DER parser

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS certificate parser selected by MGTLSBUILTIN fails to verify that a long-form DER element length fits within the remaining certificate buffer. In mgdertotlv and mgdernext, a peer-controlled length can advance t...

CVE-2026-73260 Mongoose: Out-of-bounds Read via length-counter underflow in built-in TLS X.509 DER parser

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS certificate parser selected by MGTLSBUILTIN fails to verify that a long-form DER element length fits within the remaining certificate buffer. In mgdertotlv and mgdernext, a peer-controlled length can advance t...

CVE-2026-73260

The Mongoose embedded web server and network library is vulnerable to an out-of-bounds read due to a length-counter underflow in its built-in TLS X.509 DER parser (prior to version 7.23 ). Specifically, the functions mg_der_to_tlv() and mg_der_next() fail to verify if a long-form DER element leng...

EUVD-2026-101596

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS stack selected by MGTLSBUILTIN in src/tlsbuiltin.c accepts a TLS 1.3 record whose decrypted size is exactly the 16-byte authentication tag with no plaintext or ContentType byte. In mgtlsrecvrecord, the msgsz...

CVE-2026-73252 Mongoose: Unauthenticated remote heap out-of-bounds read in built-in TLS: off-by-one length check in mg_tls_recv_record() underflows recv_len to SIZE_MAX

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS stack selected by MGTLSBUILTIN in src/tlsbuiltin.c accepts a TLS 1.3 record whose decrypted size is exactly the 16-byte authentication tag with no plaintext or ContentType byte. In mgtlsrecvrecord, the msgsz...

CVE-2026-73252 Mongoose: Unauthenticated remote heap out-of-bounds read in built-in TLS: off-by-one length check in mg_tls_recv_record() underflows recv_len to SIZE_MAX

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS stack selected by MGTLSBUILTIN in src/tlsbuiltin.c accepts a TLS 1.3 record whose decrypted size is exactly the 16-byte authentication tag with no plaintext or ContentType byte. In mgtlsrecvrecord, the msgsz...

CVE-2026-73252

The Mongoose embedded web server and network library (prior to version 7.23 ) contains an unauthenticated remote heap out-of-bounds read vulnerability in its built-in TLS stack. The root cause is an off-by-one length check in mg_tls_recv_record() within src/tls_builtin.c, which allows a TLS 1.3 r...

CVE-2026-73260: Out-of-bounds Read

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS certificate parser selected by MGTLSBUILTIN fails to verify that a long-form DER element length fits within the remaining certificate buffer. In mgdertotlv and mgdernext, a peer-controlled length can advance t...

0perator (>=0.1.0, <=0.3.0), 0pflow (>=0.1.0-dev.00aaa03, <=0.1.0) +2904 more potentially affected by CVE-2026-104872 via @opentelemetry/instrumentation-mongoose (>=0.31.0, <=0.66.0)

@opentelemetry/instrumentation-mongoose NPM version =0.31.0, =0.1.0, =0.1.0-dev.00aaa03, =0.0.1, =3.11.1, =0.0.53, =0.0.31, =0.8.0, =0.1.0, =1.0.5, =0.0.0-dev-nicolas-fix-publishing-aurora-mcp-1750279939, =0.3.702, =0.0.65, =0.2.0, =0.2.0, =0.2.6 and more Source cves: CVE-2026-104872 Source...

0perator (>=0.1.0, <=0.3.0), 0pflow (>=0.1.0-dev.00aaa03, <=0.1.0) +2904 more potentially affected by CVE-2026-104872 via @opentelemetry/instrumentation-mongoose (>=0.31.0, <=0.66.0)

@opentelemetry/instrumentation-mongoose NPM version =0.31.0, =0.1.0, =0.1.0-dev.00aaa03, =0.0.1, =3.11.1, =0.0.53, =0.0.31, =0.8.0, =0.1.0, =1.0.5, =0.0.0-dev-nicolas-fix-publishing-aurora-mcp-1750279939, =0.3.702, =0.0.65, =0.2.0, =0.2.0, =0.2.6 and more Source cves: CVE-2026-104872 Source...

Multiple @opentelemetry/instrumentation-* packages expose database username via unconditional db.user span attribute

Impact Multiple @opentelemetry/instrumentation- packages recorded the database connection username as the db.user span attribute on every instrumented database operation. This attribute was emitted unconditionally — it was not gated by enhancedDatabaseReporting or any other opt-in flag, and it wa...

0perator (>=0.1.0, <=0.3.0), 0pflow (>=0.1.0-dev.00aaa03, <=0.1.0) +2904 more potentially affected by CVE-2026-104872 via @opentelemetry/instrumentation-mongoose (>=0.31.0, <=0.66.0)

@opentelemetry/instrumentation-mongoose NPM version =0.31.0, =0.1.0, =0.1.0-dev.00aaa03, =0.0.1, =3.11.1, =0.0.53, =0.0.31, =0.8.0, =0.1.0, =1.0.5, =0.0.0-dev-nicolas-fix-publishing-aurora-mcp-1750279939, =0.3.702, =0.0.65, =0.2.0, =0.2.0, =0.2.6 and more Source cves: CVE-2026-104872 Source...

CVE-2026-73256

A flaw was found in Mongoose. A remote, unauthenticated attacker can achieve unauthorized access or bypass security controls through HTTP request smuggling. Due to an error in protocol version validation, Mongoose fails to identify HTTP/1.0 requests and incorrectly processes chunked transfer...

CVE-2026-73257

A flaw was found in Mongoose. When processing incoming requests containing both Content-Length and Transfer-Encoding headers, the server accepts both headers instead of rejecting the malformed request. In environments where an upstream proxy processes request boundaries differently, a remote,...

CVE-2026-73251

A flaw was found in Mongoose. When configured with a Certificate Authority CA bundle, the built-in Transport Layer Security TLS implementation matches server certificates by name without verifying their cryptographic signatures. A remote network attacker can exploit this vulnerability by presenti...

CVE-2026-101003

A flaw was found in Mongoose. A remote attacker can trigger a stack-based buffer overflow by sending specially crafted network messages to the MQTT broker component. This flaw could lead to a Denial of Service DoS condition by crashing the application...

DEBIAN-CVE-2026-101003

A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The...

CVE-2026-101003

A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The...

UBUNTU-CVE-2026-101003

A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The...