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CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Weakness Summary

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

  • Canonical source: MITRE CWE-776 (opens in a new tab)
  • Published Atomicorp CVE observations: 2
  • Distinct affected products in those observations: 2
  • Active Atomicorp rules associated with this weakness: 9

Atomicorp Research Context

Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.

The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.

A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.

Selected Published CVE Observations

CVEVulnerabilityProductAtomicorp findingObserved rules
CVE-2019-11253Kubernetes API Server - YAML Parsing DoS (Billion Laughs)kubernetesProtected by Atomicorp rules391213
CVE-2026-54077ArcadeDB: IMPORT DATABASE allows SSRF and arbitrary local file read by authenticated usersarcadedbProtected by Atomicorp rules337109 , 337110 , 340165 , 344360 , 347009 , 390722 , 398021 , 398022

Associated Atomicorp WAF Rules

RuleStatusBehavior
337109Activedisruptive (deny)
337110Activedisruptive (deny)
340165Activedisruptive (deny)
344360Activedisruptive (deny)
347009Activedisruptive (deny)
390722Activedisruptive (deny)
391213Activedisruptive (deny)
398021Activedisruptive (deny)
398022Activedisruptive (deny)

MITRE associates this CWE with the following attack-pattern entries. These taxonomy relationships are context, not Atomicorp coverage claims:

CAPEC-197 (opens in a new tab)