CVE-2026-48511 MessagePack-CSharp: ExpandoObject formatter can perform quadratic insertion work on untrusted maps

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.301 and 3.1.7, ExpandoObjectFormatter.Deserialize populates System.Dynamic.ExpandoObject by calling IDictionary.Add for each map entry. ExpandoObject internally maintains member names in array-like structures, so inserting many...

CVE-2026-48511 MessagePack-CSharp: ExpandoObject formatter can perform quadratic insertion work on untrusted maps

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.301 and 3.1.7, ExpandoObjectFormatter.Deserialize populates System.Dynamic.ExpandoObject by calling IDictionary.Add for each map entry. ExpandoObject internally maintains member names in array-like structures, so inserting many...

CVE-2026-53539

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, when parsing application/x-www-form-urlencoded bodies, QuerystringParser located the field separator with a two step lookup: it first scanned the entire remaining buffer for &, and only when no & existed anywhere ahead...

CVE-2026-53550 js-yaml: Quadratic-complexity DoS in merge key handling via repeated aliases

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0 and 3.15.0, a crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size an...

CVE-2026-53550 js-yaml: Quadratic-complexity DoS in merge key handling via repeated aliases

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0 and 3.15.0, a crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size an...

CVE-2026-53550

js-yaml vulnerability CVE-2026-53550 stems from the merge-key handling (<<) in lib/loader.js, causing quadratic parse-time DoS when processing crafted YAML with repeated aliases prior to version 4.2.0. Affected: js-yaml

EUVD-2026-38137

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/userapikeyauth.py of the component M2M JWT Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. A high complexity level is...

CVE-2026-12771

CVE-2026-12771 affects the litellm library by BerriAI up to version 1.82.2, specifically in litellm/proxy/auth/user_api_key_auth.py (M2M JWT Handler). The flaw enables improper authorization via remote exploitation with high attack complexity; public PoC exists. SNYK detaails identify the vulnera...

CVE-2026-12771 BerriAI litellm M2M JWT user_api_key_auth.py improper authorization

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/userapikeyauth.py of the component M2M JWT Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. A high complexity level is...

GHSA-H4GH-22QQ-72R7 py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()

Summary PackInfo.read uses an On^2 cumulative sum pattern where numstreams is read directly from the archive header. A crafted .7z archive with a large numstreams value causes excessive CPU consumption during SevenZipFile.init — no extraction is needed. A 50 KB archive takes 7 seconds of CPU time...

py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()

Summary PackInfo.read uses an On^2 cumulative sum pattern where numstreams is read directly from the archive header. A crafted .7z archive with a large numstreams value causes excessive CPU consumption during SevenZipFile.init — no extraction is needed. A 50 KB archive takes 7 seconds of CPU time...

Inefficient Algorithmic Complexity

Overview py7zr is a Pure python 7-zip library Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the PackInfo.read function. An attacker can cause excessive CPU consumption by providing a crafted archive with a large number of streams, leading to...

CVE-2026-49293 CPU exhaustion via O(n^2) BigInt construction on radix-prefixed integer literals

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. Versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration...

CVE-2026-49293 CPU exhaustion via O(n^2) BigInt construction on radix-prefixed integer literals

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. Versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration...

PT-2026-51098

Name of the Vulnerable Software and Affected Versions py7zr versions prior to 1.1.3 Description A denial of service issue exists where a crafted .7z archive with a large numstreams value causes excessive CPU consumption. This occurs because the PackInfo. read function in archiveinfo.py uses an On...

Security Bulletin: Dirty COW Vulnerability (CVE-2016-5195)

Question Security Bulletin: Dirty COW Vulnerability CVE-2016-5195 "Business Unit":"code":"BU059","label":"IBM Software w/o TPS","Product":"code":"SS8NDZ","label":"IBM Aspera","Component":"","Platform":"code":"PF025","label":"Platform Independent","Version":"All Versions","Edition":"","Line of...

markdown-it: Quadratic complexity DoS in smartquotes rule via replaceAt string operations

Summary A quadratic time complexity vulnerability exists in markdown-it's smartquotes rule enabled via the typographer: true option. An attacker can craft a markdown input consisting of consecutive quotation marks that causes the parser to consume excessive CPU time, leading to denial of service...

Inefficient Algorithmic Complexity

Overview org.webjars.npm:markdown-it is a modern pluggable markdown parser. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the replaceAt function in the smartquotes rule when processing markdown input with a large number of consecutive quotation mar...

NPM: JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases

NPM: JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases vulnerability discovered by ? in WordPress Npm js-yaml versions = 4.1.1...

PT-2026-49555

Name of the Vulnerable Software and Affected Versions markdown-it affected versions not specified Description A quadratic time complexity issue exists in the smartquotes rule when the typographer: true option is enabled. An attacker can provide markdown input containing a large number of...