High [CVE-2026-83606] Denial of Service via regular expression backtracking in processing instructions
This high-severity Red Hat Linux advisory covers CVE-2026-83606 affecting Red Hat OpenShift Container Platform 4.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in xmldom, a JavaScript XML DOM parser. This vulnerability, a Regular Expression Denial of Service (ReDoS), occurs due to inefficient processing of unterminated processing instructions in XML input.
A remote, unauthenticated attacker can send a specially crafted XML input, causing quadratic backtracking and stalling the Node.js event loop. This can lead to a Denial of Service (DoS) for applications using xmldom.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-1333.
Affected Red Hat products: Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 48 minutes ago·verify at source
- 0.9.11
Official advisory · high-confidence parse· fetched 48 minutes ago·verify at source
Mitigation
Upgrade to a fixed release: 0.9.11. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 48 minutes ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.