Collected research

Tricks for Reliable Split-Second DNS Rebinding in Chrome and Safari

Delaying the A response makes Safari load an attacker's public IPv6 host first and then switch to the private IPv4 target; Chrome's preference for public IPv6 over private IPv4 plus a connection reset does the same, so rebinding completes in seconds. An iframe under the rebound origin bypasses Chrome's Private Network Access checks, exposing internal services and cloud metadata.

Record

Published by

intruder.io

Topic

Browser

In the archive

• Collected in the 2023 research round

Related sources

• DNS delay server
• Rebinding server

Tags

• dns-rebinding
• sop-bypass
• dns
• same-origin-policy
• iframe
• ssrf
• info-leak
• tooling
• owasp-a01-2021
• owasp-a10-2021

This page is the archive's own catalogue record. The research is the work of intruder.io, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 14 August 2026.