CVE-2026-53937

CVE-2026-53937 affects the MCP Kotlin SDK (versions 0.7.0–0.12.0 ). The root cause is an unbounded kotlinx.io.Buffer in ReadBuffer.append, which grows indefinitely when the stdio transport receives a byte stream without a terminating newline. The issue is amplified by StdioServerTransport and Std...

EUVD-2026-74297

MCP Kotlin SDK is the Kotlin Multiplatform software development kit for the Model Context Protocol. In versions 0.7.0 through 0.12.0, ReadBuffer.append in kotlin-sdk-core/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/shared/ReadBuffer.kt writes every chunk of bytes received from the...

EUVD-2026-71220

Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a remote HTTP server to exhaust memory on the client host and cause a denial of service. Two HTTP/1 response-parser states accumulate server data without any cap. In lib/mint/http1.ex, decodestatusline/4...

CVE-2026-85442 MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation

MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten, allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory an...

PT-2026-85291

Name of the Vulnerable Software and Affected Versions MOOS core-moos versions prior to 10.4.1 Description An issue exists where the software fails to validate packet length declarations in the CMOOSCommPkt::OnBytesWritten function. This allows unauthenticated attackers to trigger unbounded buffer...

Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection

Summary Mailpit's SMTP server reads each command line with an unbounded bufio.Reader.ReadString'\n' before parsing the command or enforcing any protocol length limit. A remote SMTP client can send an oversized single command line and force Mailpit to allocate attacker-controlled memory before the...

CVE-2026-82864

pdfme pdf-lib versions before 5.5.10 contain an unbounded buffer growth vulnerability in the DecodeStream.ensureBuffer method that allows attackers to cause denial of service by supplying a crafted PDF with a FlateDecode stream containing a decompression bomb. Attackers can upload a small...

CVE-2026-82864

pdfme pdf-lib versions before 5.5.10 contain an unbounded buffer growth vulnerability in the DecodeStream.ensureBuffer() method. An attacker can supply a crafted PDF with a FlateDecode stream containing a decompression bomb, causing a small compressed file to decompress to hundreds of megabytes. ...

CVE-2026-82864 pdfme pdf-lib before 5.5.10 Denial of Service via Decompression Bomb

pdfme pdf-lib versions before 5.5.10 contain an unbounded buffer growth vulnerability in the DecodeStream.ensureBuffer method that allows attackers to cause denial of service by supplying a crafted PDF with a FlateDecode stream containing a decompression bomb. Attackers can upload a small...

Amazon Linux 2 : gstreamer1-plugins-good, --advisory ALAS2-2026-3899 (ALAS-2026-3899)

The version of gstreamer1-plugins-good installed on the remote host is prior to 1.18.4-6. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3899 advisory. GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability...

CVE-2026-53965

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965 MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965 MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service

The MCP PHP SDK Composer package mcp/sdk is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only...

CVE-2026-53965

CVE-2026-53965 affects the MCP PHP SDK (Composer package mcp/sdk), versions 0.5.0 through 0.7.0 . The HttpTransport class's processSSEStream() method appends each 4 KiB read chunk to an in-memory buffer ($this->sseBuffer) with no upper bound ; the buffer is only flushed upon encountering the S...

CVE-2026-67445 Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine using bufio.Reader.ReadString before session.parseLine parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticate...

CVE-2026-63495 Libevent: Unbounded memory accumulation in WebSocket server via fragmented frames

Libevent is an event notification library. From 2.2.0-alpha-dev until 2.2.2-alpha, the libevent WebSocket server in ws.c accumulates fragmented frames in evws-incompleteframes without enforcing a total message-size limit. An unauthenticated remote client can repeatedly send fragmented WebSocket...

Fixed in Apache Tomcat 10.1.59

Note: The issues below were fixed in Apache Tomcat 10.1.58 but the release vote for the 10.1.58 release candidate did not pass. Therefore, although users must download 10.1.59 to obtain a version that includes a fix for these issues, version 10.1.58 is not included in the list of affected version...

GHSA-7M52-JW36-44R3 MCP PHP SDK: client HttpTransport SSE buffer (sseBuffer .= chunk) grows unbounded when server withholds the event delimiter

Summary The HTTP client transport in mcp/sdk reads a Server-Sent-Events SSE response stream incrementally and appends each 4 KiB chunk to an in-memory buffer $this-sseBuffer .= $chunk; with no upper bound. The buffer is only ever flushed when an SSE event delimiter "\n\n" appears. A remote MCP...

Fixed in Apache Tomcat 9.0.121

Low: Authenticated WebSocket session survives end of HTTP session CVE-2026-73180 If the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the...

Fixed in Apache Tomcat 10.1.58

Low: DoS in WebSocket chat example CVE-2026-66299 The WebSocket chat example provided an unbounded buffer for undelivered messages. A maliciously slow client could cause the buffer to grow continuously, eventually leading to an memory exhaustion and failure of the Tomcat process. This was fixed...