H3XAOperational intelligence
Live analytical pictureEvidence before assessment
TypeTechnique
External ID—
First seen2026-10-17
Last seen2026-10-17

Confidence

—

This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

Labels

attack-patterncapec
10 recorded

Relationships

related-toVulnerability
related-toVulnerability
related-toVulnerability
related-toVulnerability
related-toVulnerability
related-toVulnerability
related-toVulnerability
related-toVulnerability
1 external

References

capec
CAPEC-221
open