NPM: xmldom: Quadratic-time parsing via the malformed-input recovery path — `parseElementStartPart` re-scan and `normalize()` adjacent-text merge

NPM: xmldom: Quadratic-time parsing via the malformed-input recovery path — parseElementStartPart re-scan and normalize adjacent-text merge vulnerability discovered by ? in WordPress Npm xmldom versions = 0.3.0, = 0.6.0...

xmldom: Quadratic-time parsing via the malformed-input recovery path — `parseElementStartPart` re-scan and `normalize()` adjacent-text merge

Summary xmldom's malformed-input error-recovery path has two quadratic-time On² behaviors that a single crafted input triggers together, so a tiny, highly compressible document tens of KB stalls the Node.js event loop for multiple seconds. It is reachable from DOMParser.parseFromString under...

CVE-2026-83614

xmldom , a pure JavaScript XML DOM parser, is vulnerable to quadratic-time denial of service via two independent code paths. The first, in lib/sax.js, causes parseElementStartPart to repeatedly rescan a malformed tag name to the next > during single-character recovery, reachable through the de...

PT-2026-84296

A flaw was found in openshift/oauth-server. The OAuth login and error page endpoints pass the unauthenticated Accept-Language header to golang.org/x/text/language.ParseAcceptLanguage without input validation. A bypass of the CVE-2022-32149 mitigation exists: the upstream guard counts only '-'...

CVE-2026-79658: Uncontrolled Resource Consumption

Ech0 before 5.0.1 does not impose any size or shape limit on the Accept-Language header processed by its i18n middleware, which runs on every HTTP request. The header is passed unfiltered to go-i18n's NewLocalizer, which internally calls golang.org/x/text/language.ParseAcceptLanguage. The...

CVE-2026-49851 Mistune: Potential DoS via quadratic-time parsing in parse_link_text

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Mistune is vulnerable to a CPU exhaustion DoS due to superlinear approximately On² behavior in parselinktext. When parsing Markdown containing many consecutive characters, parselinktext repeatedly scans the input usin...

CVE-2021-41119: Uncontrolled Resource Consumption

Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of servic...