CVE-2026-26209

The CVE-2026-26209 issue affects the Python library cbor2 (including the C extension _cbor2) prior to version 5.9.0. The root cause is uncontrolled recursion when decoding deeply nested CBOR structures, as the C extension relies on Python’s Py_EnterRecursiveCall rather than a data-driven depth li...

CVE-2026-26209

cbor2 provides encoding and decoding for the Concise Binary Object Representation CBOR serialization format. Versions prior to 5.9.0 are vulnerable to a Denial of Service DoS attack caused by uncontrolled recursion when decoding deeply nested CBOR structures. This vulnerability affects both the...

Uncontrolled Recursion

Overview parse-server is a version of the Parse backend that can be deployed to any infrastructure that can run Node.js. Affected versions of this package are vulnerable to Uncontrolled Recursion via the pre-validation transform pipeline. An attacker can cause the server process to become...

GHSA-9FJP-Q3C4-6W3J Parse Server has a query condition depth bypass via pre-validation transform pipeline

Impact An attacker can send an unauthenticated HTTP request with a deeply nested query containing logical operators to permanently hang the Parse Server process. The server becomes completely unresponsive and must be manually restarted. This is a bypass of the fix for CVE-2026-32944. Patches The...

PT-2026-26782

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.55 Parse Server versions prior to 9.6.0-alpha.44 Description An unauthenticated attacker can send a crafted HTTP request with a deeply nested query containing logical operators, causing the Parse Server proce...

Stack overflow parsing XML with deeply nested DTD content models

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CVE-2026-32944

Technical details sufficient to assess the vulnerability are not provided in the connected documents; monitor for updates.

CVE-2026-32944 Parse Server crash via deeply nested query condition operators

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.21 and 8.6.45, an unauthenticated attacker can crash the Parse Server process by sending a single request with deeply nested query condition operators. This terminates the...

Uncontrolled Recursion

Overview nltk is a Natural Language Toolkit NLTK is a Python package for natural language processing. Affected versions of this package are vulnerable to Uncontrolled Recursion via the JSONTaggedDecoder.decodeobj function in jsontags.py. An attacker can cause the application to crash by submittin...

Natural Language Toolkit (NLTK) has unbounded recursion in JSONTaggedDecoder.decode_obj() may cause DoS

Summary JSONTaggedDecoder.decodeobj in nltk/jsontags.py calls itself recursively without any depth limit. A deeply nested JSON structure exceeding sys.getrecursionlimit default: 1000 will raise an unhandled RecursionError, crashing the Python process. Affected code File: nltk/jsontags.py, lines...

com.fasterxml.jackson.core/jackson-core: jackson-core Potential StackoverflowError

A nested data handling flaw was found in Jackson Core. When parsing particularly deeply nested data structures, a StackoverflowError can occur...

com.fasterxml.jackson.core/jackson-core: jackson-core Potential StackoverflowError

A nested data handling flaw was found in Jackson Core. When parsing particularly deeply nested data structures, a StackoverflowError can occur...

com.fasterxml.jackson.core/jackson-core: jackson-core Potential StackoverflowError

A nested data handling flaw was found in Jackson Core. When parsing particularly deeply nested data structures, a StackoverflowError can occur...

com.fasterxml.jackson.core/jackson-core: jackson-core Potential StackoverflowError

A nested data handling flaw was found in Jackson Core. When parsing particularly deeply nested data structures, a StackoverflowError can occur...

PYSEC-2026-2263

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service DoS attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENC...

DEBIAN-CVE-2026-30922

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service DoS attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENC...

CVE-2026-30922

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service DoS attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENC...

CVE-2026-30922

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service DoS attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENC...

GHSA-9XP9-J92R-P88V Parse Server crash via deeply nested query condition operators

Impact An unauthenticated attacker can crash the Parse Server process by sending a single request with deeply nested query condition operators. This terminates the server and denies service to all connected clients. Patches A depth limit for query condition operator nesting has been added via the...

Uncontrolled recursion DoS in JustHTML() via deeply nested HTML

Summary justhtml through 1.9.1 allows denial of service via deeply nested HTML. During parsing, JustHTML.init always reaches TreeBuilder.finish, which unconditionally calls populateselectedcontent. That function recursively traverses the DOM via findelements / findelement without a depth bound,...