security(core): reject the RFC 8215 local-use NAT64 prefix in the SSRF filter (24.05) - #7960
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shepardly[bot] merged 4 commits intoAug 27, 2026
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…F filter Backport of #7959 to release.24.05. isBlockedIP admits only ipaddr.js 'unicast' addresses. ipaddr.js@1.9.1 reports the well-known NAT64 prefix (64:ff9b::/96) as 'rfc6052' but the RFC 8215 local-use prefix (64:ff9b:1::/48) as generic unicast, so add an explicit check to reject that prefix, matching the existing NAT64 handling. Network-specific NAT64 prefixes from an operator's own unicast space cannot be distinguished by prefix and remain out of scope. Adds unit tests for 64:ff9b:1::7f00:1. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The changelog is generated from PR and commit titles later, so an entry written by hand here is duplicated work at best. It is also the single worst file in this wave for conflicts: every merge to the base appends a line, which re-conflicts every open branch that also appends one. Eight of the sixteen conflicts across these security PRs today were this file and nothing else, and two of them came back within the hour. Only the lines this branch added are removed - the file is otherwise the base's, and the change here was purely additive, so nothing else moves.
Cookiezaurs
approved these changes
Aug 27, 2026
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Backport of #7959 to
release.24.05.isBlockedIPin the sharedapi/utils/ssrf-protection.jsadmits only ipaddr.jsunicastaddresses.ipaddr.js@1.9.1reports the well-known NAT64 prefix (64:ff9b::/96) asrfc6052(rejected) but the RFC 8215 local-use prefix (64:ff9b:1::/48) as genericunicast, so it was accepted. This adds an explicit check to reject64:ff9b:1::/48, matching the existing NAT64 handling. Network-specific NAT64 prefixes from an operator's own unicast space cannot be distinguished by prefix and remain out of scope.Identical to #7959. Two unit tests added; full SSRF suite and eslint green.
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